Question 1

why does my 4155e take forever to print, like several minutes just to spit out one page?

Accepted Answer

DIAGNOSIS The extreme delay in printing on the HP DeskJet 4155e is rarely a mechanical failure of the print head or carriage; rather, it is a "buffer bottleneck" occurring during the data transmission phase. This happens when the printer's internal memory (RAM) cannot process the incoming data stream fast enough, or the Wi-Fi signal is experiencing packet loss, forcing the printer to pause and request the same data multiple times before it can begin the physical printing process. You can confirm this is a data issue if the printer remains completely silent for 60-120 seconds, and then suddenly prints the page at normal speed. If the printer is physically moving slowly (stuttering), it is a carriage issue, but "taking forever to start" is almost always a result of the printer struggling to render a high-resolution image or a complex PDF over a congested 2.4GHz wireless band. This is particularly common when printing high-DPI graphics or documents with embedded fonts that the 4155e's basic processor struggles to rasterize. FIX To eliminate the lag and optimize the data pipeline, follow these precise steps to reconfigure your connection and print settings: Perform a Hard Power Reset: While the printer is ON, pull the power cord directly from the back of the machine. Unplug the power cord from the wall outlet. Wait exactly 60 seconds. Plug it back into the wall first, then back into the printer. This clears the temporary print spooler cache. Switch to Static IP: Access the HP Smart App or the printer's Embedded Web Server (EWS) by typing the printer's IP address into a web browser. Navigate to Network > IPv4 Configuration. Change the setting from "Automatic/DHCP" to "Manual." Assign a static IP address (e.g., 192.168.1.50) to prevent the router from constantly re-assigning the address, which causes "handshake" delays. Adjust Print Quality Settings: On your computer, go to Control Panel > Devices and Printers. Right-click the HP DeskJet 4155e and select Printing Preferences. Change the "Print Quality" from "Best" or "Maximum" to "Normal" or "Draft." High-quality settings generate massive files that overwhelm the 4155e's limited buffer. Disable "Quiet Mode": Ensure Quiet Mode is turned OFF in the HP Smart App under Printer Settings. When enabled, this mode intentionally slows down the carriage movement and processing speed to reduce noise, which can make a print job feel like it is taking forever. IF THAT DIDN'T WORK Update the Firmware via HP Smart: Check for a firmware update in the HP Smart App. HP frequently releases patches for the "e" series printers that specifically address wireless timeout issues and improve the way the printer handles PDF rendering. Bypass the Wireless Connection: To determine if the Wi-Fi is the culprit, connect a USB 2.0 A-to-B printer cable directly from your PC to the printer. If the page prints instantly, your router is likely experiencing interference on the 2.4GHz channel, or the printer is too far from the access point. Print as Image (PDFs only): If the lag only happens with PDFs, open the file in Adobe Acrobat, click Print > Advanced, and check the box for "Print As Image." This offloads the processing work from the printer's weak CPU to your computer's powerful CPU, sending a pre-rendered bitmap that the printer can spit out immediately. Clear the Windows Print Spooler: Open the "Services" app in Windows, find "Print Spooler," right-click it, and select "Stop." Navigate to C:\Windows\System32\spool\PRINTERS and delete all files in that folder. Restart the Print Spooler service. This removes corrupted "ghost" jobs that may be clogging the queue. HEADS UP Avoid 5GHz Networks: The DeskJet 4155e is designed for 2.4GHz. If you have a "Smart Connect" router that blends both bands, the printer may intermittently disconnect or lag as it tries to negotiate the connection. Ink Levels and Cleaning: If the printer pauses *during* the print process, it may be performing an automatic print head cleaning cycle. Ensure your ink cartridges are seated firmly and not critically low, as low ink can trigger more frequent maintenance cycles. Paper Weight Matters: Using heavy cardstock or non-standard paper can trigger the internal sensors to slow the feed rate to prevent jams, which mimics a software lag. Stick to standard 20lb bond paper for maximum speed.

Question 2

trying to scan from my phone with the hp smart app and it just won't find my 4155e printer.

Accepted Answer

DIAGNOSIS The inability of the HP Smart app to locate the DeskJet 4155e usually stems from a breakdown in the "handshake" between the mobile device and the printer's wireless radio. This most commonly occurs because of Network Segmentation. Many modern routers broadcast dual-band signals (2.4GHz and 5GHz) under the same SSID. While your phone may be utilizing the faster 5GHz band, the DeskJet 4155e is limited to 2.4GHz. If your router does not support "Band Steering" or has a strict firewall between bands, the app will fail to "see" the printer even though both appear connected to the same network name. Another frequent cause is the "Setup Mode" timeout. The 4155e enters a specific discovery mode for 2 minutes after being powered on or reset. If the app is launched after this window expires, the printer stops broadcasting its discovery beacon, making it invisible to the HP Smart app. Additionally, if you have a "Guest" network enabled on your router, these networks are designed to isolate devices from one another for security, effectively blocking the communication path required for scanning. FIX Follow these exact steps to force a reconnection and clear the communication bridge: Reset Network Settings: On the printer control panel, press and hold the Wireless button and the Cancel button (the X) simultaneously for exactly 5 seconds. The power button will flash, indicating the network settings have been cleared and the printer is now in "Setup Mode." Force Phone Connection: On your smartphone, go to Settings > Wi-Fi. Look for a network named "HP-Setup-4155-DeskJet." Connect to this network directly. If prompted for a password, leave it blank or check the printer's information page. Refresh the App: Completely force-close the HP Smart app (swipe it away from your recent apps list). Re-open the app and select "Add Printer" or the plus (+) icon. Assign Network: The app should now detect the 4155e in setup mode. Select the printer, then choose your home Wi-Fi network from the list and enter your password. Wait for the wireless light on the printer to stop blinking and remain solid blue. Verify Scan Permissions: When the app asks for permission to access "Local Network" (iOS) or "Location" (Android), select "Allow While Using App." Without these specific permissions, the app cannot scan the IP range of your router to find the hardware. IF THAT DIDN'T WORK Disable 5GHz Temporarily: Log into your router's admin panel (usually 192.168.1.1) and temporarily disable the 5GHz band. This forces your phone onto the 2.4GHz band, ensuring it is on the exact same frequency as the printer. Once the scan works, you can re-enable 5GHz. Clear the HP Smart Cache: On Android, go to Settings > Apps > HP Smart > Storage > Clear Cache and Clear Data. On iOS, delete the app entirely and reinstall it from the App Store to clear corrupted cached network profiles. Check IP Conflict: Print a Network Configuration Page by pressing the Information (i) button. If the IP address starts with 169.254, the printer is not actually connected to the router and is using an APIPA address. Perform a hard power reset by unplugging the power cord from the back of the printer for 30 seconds while the printer is on. Disable VPN: If you have a VPN (like NordVPN or ExpressVPN) active on your phone, the app will be unable to see local network devices. Turn off the VPN entirely before attempting to link the printer. HEADS UP Avoid Guest Networks: Never connect your printer to a "Guest" Wi-Fi network; these are designed to prevent the exact type of device-to-device communication required for scanning. Static IP Assignment: To prevent this from happening again, use your router settings to assign a "Static IP" or "DHCP Reservation" to the printer's MAC address. This prevents the printer from changing addresses and "disappearing" from the app. Update Firmware: Once connected, check the "Printer Settings" in the HP Smart app and run any available firmware updates. HP frequently releases patches to improve wireless stability for the 4100 series. Power Cycle Sequence: If the connection drops, always restart in this order: Modem/Router first, then the Printer, then the Phone.

Question 3

my prints are coming out with streaks and faded colors, i just put in new hp 67 ink, is the printer broken?

Accepted Answer

DIAGNOSIS The issue you are experiencing with your HP DeskJet 4155e is not a hardware failure or a "broken" printer, but rather a classic case of printhead nozzle obstruction. Because this model uses integrated ink cartridges (where the printhead is built directly into the HP 67 cartridge), the ink can dry and solidify within the microscopic nozzles if the printer sits idle for even a few days. This creates a physical barrier that prevents ink from flowing evenly onto the paper, resulting in horizontal white streaks or "washed out" colors despite the cartridges being brand new. This often happens even with new cartridges if the protective plastic tape wasn't fully removed or if the printer's internal priming sequence failed to fully saturate the nozzles during installation. To confirm this is the issue, print a "Printer Status Report." If you see missing segments of color in the solid blocks of ink, the nozzles are partially clogged. If the colors are completely absent, you may have an air lock in the cartridge or a faulty chip on the HP 67 cartridge itself. FIX Since the printhead is part of the cartridge, the goal is to force the ink through the nozzles using the internal pump system or manual agitation. Follow these exact steps: On the printer's control panel, press the Information (i) button to print a status page. This confirms which specific color (Cyan, Magenta, Yellow, or Black) is streaking. Open the HP Smart App on your connected PC or mobile device. Navigate to Printer Settings > Tools > Print Quality Tools. Select Clean Printheads. The printer will feed a page and perform a series of nozzle firings. If the streaks persist, repeat the "Clean Printheads" process a second time. The second cycle uses a higher pressure burst to clear more stubborn debris. If the issue is only with one cartridge, remove that specific HP 67 cartridge. Take a lint-free, damp paper towel (distilled water is best) and gently blot the gold-colored printhead nozzles on the bottom of the cartridge. Do not rub; simply press the nozzle against the damp cloth until you see a solid "stamp" of ink appearing on the towel. Reinsert the cartridge and run one final alignment page to synchronize the nozzles. IF THAT DIDN'T WORK The Damp-Tissue Soak: If the blotting method failed, place the problematic HP 67 cartridge nozzles-down into a shallow bowl containing 2mm of warm distilled water for exactly 10 minutes. This softens the dried ink "plugs" from the inside out. Dry the electrical contacts thoroughly with a microfiber cloth before reinstalling. Hard Reset the Electronics: While the printer is powered on, pull the power cord directly from the back of the unit. Unplug it from the wall outlet. Wait 60 seconds. Plug it back into a wall outlet (avoid surge protectors for this test) and restart. This forces the printer to re-initialize the ink delivery system. Verify Cartridge Authenticity: Ensure you are using genuine HP 67 or 67XL cartridges. Third-party "remanufactured" cartridges often have inconsistent ink viscosity or air bubbles trapped in the sponge, which causes permanent streaking that cannot be cleaned. Check Paper Settings: If you are using photo paper or heavy cardstock, go to the HP Smart App and change the Media Type from "Plain Paper" to the correct setting. Using the wrong setting can cause the printer to fire ink at the wrong rate, mimicking a clog. HEADS UP Avoid Idle Time: To prevent this from recurring, print at least one color page every two weeks. This keeps the ink from drying in the nozzles. Use Wall Outlets: Always plug the DeskJet 4155e directly into a wall socket. Power strips or old surge protectors can sometimes cause voltage drops that affect the printhead's firing consistency. Handle with Care: Never touch the gold copper contacts on the back of the HP 67 cartridges with your fingers; skin oils can cause connection errors and "Ink Cartridge Problem" messages. Storage: Keep the printer in a climate-controlled area. Extremely dry environments (like near a heater) accelerate the evaporation of ink in the nozzles.

Question 4

the touchscreen on my deskjet 4155e is totally unresponsive, i can't press any buttons.

Accepted Answer

DIAGNOSIS The unresponsive touchscreen on the HP DeskJet 4155e is typically caused by a "firmware hang," where the printer's internal controller board encounters a logic loop or a corrupted temporary cache. This often occurs during an interrupted HP+ cloud update or when the printer enters a deep sleep state and fails to wake the capacitive touch layer of the control panel. Because this model relies heavily on a constant connection to the HP Smart ecosystem, a handshake failure between the local hardware and the cloud service can cause the UI to freeze while the rest of the printer remains powered. You can confirm this is a software freeze rather than a hardware failure by checking the power LED. If the power light is solid or blinking but the screen does not react to any touch input—including the "Home" or "Back" icons—the issue is almost certainly a crashed control board. If the screen is completely black and does not illuminate upon startup, you may be dealing with a power supply failure or a disconnected ribbon cable, but in 90% of cases, the hardware is functional and simply needs a hard logic reset. FIX To resolve a frozen interface, you must perform a "Hard Power Drain" to clear the volatile memory (RAM) and force the firmware to reboot from a clean state. Follow these exact steps: While the printer is still powered on, press the Power button on the control panel (if it responds) or simply leave it as is. Reach to the back of the printer and physically pull the power cord directly out of the printer's power inlet port. Do not just turn off a power strip; the connection must be severed at the device. Unplug the other end of the power cord from the wall electrical outlet. Wait for exactly 60 to 90 seconds. This is critical because the internal capacitors on the DeskJet 4155e motherboard hold a residual charge that can keep the "frozen" state active if you plug it back in too quickly. While the printer is unplugged, press and hold the power button for 15 seconds to discharge any remaining electricity from the capacitors. Plug the power cord back into the wall outlet first, then firmly seat the cord into the back of the printer. Power the device on. Allow the printer to complete its initialization sequence (you will hear the ink carriages move) before attempting to touch the screen. IF THAT DIDN'T WORK Perform a Factory Reset via HP Smart: If the screen is still unresponsive but the printer is connected to Wi-Fi, open the HP Smart app on your mobile device. Navigate to "Printer Settings" > "Advanced Settings." This will open the Embedded Web Server (EWS) in a browser. From here, go to the "Settings" tab and select "Restore Factory Defaults." This wipes the corrupted cache that may be causing the UI hang. Check for "Ink Low" Lockout: In some rare instances, a critical ink depletion error or a "Cartridge Problem" can lock the UI. Open the ink cartridge access door and remove both the black and tri-color cartridges. Wait 30 seconds and re-insert them firmly. Sometimes the physical act of triggering the cartridge sensors forces the UI to refresh and display an error message, which "unfreezes" the screen. Clear the Paper Path: A microscopic piece of torn paper or a jammed carriage can trigger a "Critical Error" state that freezes the UI to prevent hardware damage. Open the rear access door and use a flashlight to ensure no debris is obstructing the carriage path. Clear any fragments and restart the device. Update Firmware via USB: If the freeze is caused by a failed wireless update, the UI will remain dead. Connect the printer to a PC using a USB-A to USB-B cable. Use the HP Support Assistant software to check for a firmware update. Forcing an update via a wired connection often overwrites the corrupted firmware segment causing the screen freeze. HEADS UP Avoid Power Strips: The DeskJet 4155e is sensitive to voltage fluctuations. Plugging the printer directly into a wall outlet rather than a crowded surge protector prevents "brown-out" conditions that frequently lead to UI freezes. Disable Auto-Update: If you experience frequent freezes, use the EWS (Embedded Web Server) to disable automatic firmware updates. This allows you to manually trigger updates when you are present to monitor the process. Clean the Screen: Use a dry, lint-free microfiber cloth to clean the screen. Oil buildup or dust on the capacitive surface can create "ghost touches" that make the printer appear unresponsive when it is actually reacting to a smudge. Ink Compatibility: Ensure you are using genuine HP 67 or 67XL cartridges. Third-party chips can sometimes send conflicting signals to the control board, causing the software to crash during the "Ink Check" phase of booting.

Question 5

my hp 4155e is making a horrible grinding noise when it tries to print, like a crunching sound.

Accepted Answer

DIAGNOSIS The "crunching" or grinding noise in the HP DeskJet 4155e is typically caused by a mechanical obstruction in the paper path or a failure in the carriage rail system. Most often, this happens when a piece of paper—or a foreign object like a staple or paperclip—has become lodged in the pick-up rollers or the duplexing area. When the printer attempts to engage the feed motor, the rubber rollers slip or grind against the obstruction, creating a high-pitched mechanical screech or a rhythmic crunching sound as the gears struggle to turn against a jam. Less commonly, this noise can be caused by a "carriage jam," where the ink cartridge holder cannot move freely across the width of the printer. If the carriage hits a piece of torn paper or a displaced plastic part on the rail, the stepper motor will continue to push, causing the plastic gears to grind. You can confirm this by opening the front door; if the carriage is locked in place or skewed, the issue is the rail. If the carriage moves freely but the noise happens during the initial "pull" of the paper, the issue is located in the feed rollers or the rear input tray. FIX Immediate Power Down: Press the Power button and unplug the power cord from the wall. This prevents the stepper motors from continuing to grind and potentially stripping the plastic gears. Clear the Input Tray: Remove all paper from the rear input tray. Inspect the tray for any small scraps of paper, staples, or debris that may have fallen into the feed slot. Clear the Rear Access: Locate the rear access door/flap. Open it carefully and look for any crumpled sheets of paper. If you see paper, grasp it with both hands and pull it slowly and firmly in the direction of the paper path (outward). Do not pull the paper upward or sideways, as this can tear the sheet and leave small fragments inside the rollers. Inspect the Carriage Path: Open the front ink access door. Gently slide the ink cartridge carriage from one side to the other. If it feels "stuck" or you hear a click, look for a small piece of torn paper lodged in the far left or right edges of the printer chassis. Use a pair of tweezers to remove any debris. Clean the Rollers: Use a lint-free cloth lightly dampened with distilled water to wipe the rubber pick-up rollers. Dust buildup can cause the rollers to slip, which mimics a grinding sound as the motor spins without gripping the paper. Reset and Test: Plug the printer back in, power it on, and load a small stack of clean, 20lb bond paper, ensuring the paper guides are snug against the edges but not pinching the sheets. IF THAT DIDN'T WORK Hard Power Reset: While the printer is on, unplug the power cord from the back of the device. Wait exactly 60 seconds. Plug the cord back into the wall outlet first, then back into the printer. This forces the printer to re-home the carriage and rollers, which can sometimes clear a software-driven motor glitch. Check for "Ghost" Jams: Use a flashlight to look deep into the paper path. Even a tiny sliver of paper (the size of a fingernail) can trigger the sensors and cause the rollers to grind. Use a piece of stiff cardstock (like a greeting card) and manually slide it through the paper path from the tray to the output slot to push out hidden debris. Inspect the Ink Cartridges: Ensure the cartridges are snapped fully into place. If a cartridge is slightly loose, it can rub against the internal frame during movement, creating a scratching or grinding sound. Push down on each cartridge until you hear a distinct click. Update Firmware: If the noise is a rhythmic "hunting" sound (the motor moving back and forth), it may be a firmware calibration error. Connect the printer to the HP Smart app on your PC or mobile device and check for any available firmware updates to optimize motor timing. HEADS UP Avoid Heavy Paper: Using cardstock over 110g/m² or photo paper that is too thick for this specific model can cause the rollers to slip and grind. Stick to the recommended weight for the 4155e. Paper Alignment: Always fan your paper before loading it into the tray to break the static seal between pages; this prevents the "multi-sheet pull" that leads to crunching jams. No Compressed Air: Do not use canned air to clear jams. This often pushes small pieces of paper deeper into the gear assembly, making them impossible to remove without a full teardown. Avoid Force: Never force the carriage to move if it is stuck. The plastic rails on the DeskJet series are fragile and can snap, which would require a complete replacement of the printer.

Question 6

just got a 4155e and the screen says 'carriage jam' but nothing looks stuck, what do i do?

Accepted Answer

DIAGNOSIS The "Carriage Jam" error on the HP DeskJet 4155e is frequently a "false positive" triggered by the printer's internal optical sensors or a physical obstruction that is nearly invisible to the naked eye. The carriage—the plastic assembly that holds the HP 67 ink cartridges—must move seamlessly across the encoder strip (a thin, clear plastic strip running the width of the printer). If this strip is smudged with ink or grease, the printer cannot "see" where the carriage is, triggering a jam error even if the path is clear. Another common cause is a microscopic piece of torn paper or a stray piece of orange shipping tape that was missed during the initial unboxing. Because the 4155e has a very tight internal clearance, even a small scrap of paper lodged in the far left or right "parking" zones can prevent the carriage from reaching its home position, causing the firmware to report a jam. You can confirm this by attempting to gently slide the carriage by hand while the power is off; if it hits a hard stop before reaching the edge, there is a physical obstruction. FIX Follow these precise steps to clear the carriage path and reset the sensor logic: Power down the printer completely using the power button on the rear. Unplug the power cord from the wall outlet to drain all residual electricity from the capacitors. Open the main front door and then lift the ink cartridge access door. This exposes the carriage area. Using a high-lumen LED flashlight, inspect the far right and far left ends of the carriage rail. Look specifically for small orange plastic tabs or strips of packing tape that may have been tucked into the crevices during shipping. Gently grasp the ink carriage and attempt to slide it slowly from one side to the other. If you feel resistance, do not force it; instead, look for a crumpled piece of paper lodged in the gear assembly. Locate the encoder strip—the thin, transparent plastic ribbon running horizontally behind the carriage. Use a lint-free cloth dampened with a tiny amount of distilled water to gently wipe the strip from left to right. Do not use rubbing alcohol, as it can strip the timing marks off the plastic. Close all access doors firmly. Ensure the paper tray is fully inserted and not protruding, as a misaligned tray can actually put pressure on the internal chassis and pinch the carriage. Plug the power cord back in and turn the unit on. Wait for the initialization sequence to complete. IF THAT DIDN'T WORK Perform a "Hard Power Reset." While the printer is ON, pull the power cord directly from the back of the machine. Wait exactly 60 seconds. Plug it back in. This forces the carriage to perform a "hard home" seek, which often clears phantom jam errors. Check the Rear Access Door. On the 4155e, paper can get lodged in the rear duplexing area. Open the rear panel and check for any small scraps of paper that might be pressing against the carriage rail from behind. Inspect the Ink Cartridges. Ensure the HP 67 cartridges are snapped fully into place. If a cartridge is slightly skewed or not clicked in, it can physically snag on the internal frame as the carriage moves, triggering the jam sensor. Update the Firmware via the HP Smart App. In some early production runs of the 4155e, the carriage jam sensitivity was set too high. A firmware update can recalibrate the sensor tolerances and eliminate false errors. HEADS UP Never use canned air (compressed air) inside the printer; it can push tiny fragments of paper deeper into the gear assembly or displace the encoder strip. Avoid using "heavy" or cardstock paper that exceeds the rated GSM of the 4155e, as this often leads to partial feeds that cause the exact carriage jams you are experiencing. When cleaning the encoder strip, avoid applying pressure. If the strip becomes detached from its hooks, the printer will lose all tracking and will be permanently unable to print. Always keep the printer on a completely level surface. An uneven desk can cause the carriage to slide slightly off-axis, leading to intermittent jam errors.

Question 7

my hp deskjet 4155e says it's offline on my computer and won't print, how do i get it back online?

Accepted Answer

DIAGNOSIS The "Offline" status on an HP DeskJet 4155e typically indicates a communication breakdown between the Windows/macOS print spooler and the printer's wireless network interface. This happens most frequently when the printer enters a deep sleep mode and fails to "wake" its network card, or when the router assigns a new internal IP address via DHCP that the computer's driver cannot track. If the wireless icon on the printer's display is blinking, the hardware has physically disconnected from the SSID. Another common culprit is the HP Smart app's cloud synchronization. Because the 4155e is an "e" series printer, it relies heavily on a constant handshake with HP's servers. If the printer loses its internet heartbeat, the HP Smart software often flags the device as offline even if the local Wi-Fi connection is technically active. You can confirm this by attempting to print a "Network Configuration Page" from the printer's onboard menu; if the IP address shows as 0.0.0.0 or 169.254.x.x, the printer has lost its lease on the network. FIX To resolve this, you must clear the network cache and re-establish a handshaking connection between the printer and your router. Hard Power Cycle: While the printer is on, pull the power cord directly from the back of the machine. Unplug the power cord from the wall outlet. Wait exactly 60 seconds to drain the capacitors on the logic board. Restore Network Defaults: Plug the printer back in. On the control panel, press and hold the Wireless and Cancel (X) buttons simultaneously for 5 seconds. The power button will blink, indicating the network settings have been reset to factory defaults. Initiate Setup Mode: Press the Information button (i) to print a page, then press the Wireless** button again to put the printer into "Setup Mode" (the wireless light will blink blue). This mode only lasts for 2 hours. Re-pair via HP Smart: Open the HP Smart app on your computer or smartphone. Right-click the offline printer icon and select "Hide" or "Remove Printer." Click the "Add Printer" or the (+) sign. The app will scan for the 4155e in setup mode. Finalize Connection: Follow the prompts to enter your Wi-Fi password. Ensure you are connecting to a 2.4GHz band if your router does not support band-steering, as these printers occasionally struggle with 5GHz signals. IF THAT DIDN'T WORK Disable "Use Printer Offline" Mode: In Windows, go to Control Panel > Devices and Printers. Right-click the HP DeskJet 4155e and select "See what's printing." In the window that opens, click the "Printer" menu at the top and ensure "Use Printer Offline" is unchecked. If it is checked, the computer will ignore the printer even if it is online. Assign a Static IP Address: Access your router's admin panel (usually 192.168.1.1) and find the DHCP reservation list. Assign a permanent IP address to the printer's MAC address. This prevents the "Offline" error from returning every time the router reboots. Clear the Print Spooler: Press Windows Key + R, type services.msc, and hit Enter. Find "Print Spooler," right-click it, and select "Restart." This clears jammed print jobs that can trick the OS into thinking the device is unresponsive. Update Firmware: If the printer is online but the PC says offline, use the HP Smart app to check for firmware updates. Outdated firmware on the 4155e often causes "ghost" offline status updates. HEADS UP Avoid USB Sleep: If using a USB cable instead of Wi-Fi, go to Device Manager > Universal Serial Bus controllers and disable "Allow the computer to turn off this device to save power" for the USB Root Hub. WPA3 Compatibility: The DeskJet 4155e may struggle with WPA3 security settings on newer Wi-Fi 6 routers. If you experience frequent drops, switch your router security to WPA2/WPA3 Mixed Mode. Ink Subscription: If you are using HP+ (Instant Ink), ensure the printer stays connected to Wi-Fi. If it stays offline for too long, the ink cartridges may automatically lock and refuse to print even after the connection is restored.

HP DeskJet 4155e All-in-One Wireless Color Inkjet Printer

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