Question 1

getting a 'toner cartridge problem' or 'install genuine hp toner' error right after i refilled the tank myself.

Accepted Answer

DIAGNOSIS The printer's page count since last cartridge reset has hit a non-resettable threshold, or the toner cartridge chip has failed/been dislodged during refill. FIX First, reseat the cartridge. Power off, open front door, remove the black cartridge, and reinsert it firmly. Power on. If error persists, you need to reset the cartridge counter via the printer's service menu. With printer on, from the home screen, quickly tap: Back, Back, Back, OK. Navigate to "Service Menu" > "Reset Supplies" > "Toner Cartridge." Confirm. IF THAT DIDN'T WORK The physical chip on the cartridge may be damaged or dirty. Inspect the gold contacts on the cartridge and the corresponding pins inside the printer. Clean both with a dry cotton swab. HEADS UP Using non-HP toner can cause this, but also premature wear on the drum. The error will return predictably after every ~5,000-page cartridge cycle, requiring another reset.

Question 2

printer goes offline randomly on my windows pc even though the wifi signal is strong.

Accepted Answer

DIAGNOSIS Windows is defaulting to a Wi-Fi Direct or a USB connection profile instead of the main network printer, dropping it when that virtual port isn't active. FIX Delete all existing instances of the printer from Windows. Go to Settings > Bluetooth & devices > Printers & scanners. Remove every entry for "HP LaserJet Tank 2604." Then, reinstall using ONLY the HP Smart app—it will set up the correct IP-based queue. Do not let Windows "add a printer" automatically. IF THAT DIDN'T WORK Your router's IP lease time may be too short. In your printer's network settings (touchscreen: Setup > Network Setup > View WiFi Details), note the IP address. On your PC, add the printer manually using a Standard TCP/IP Port with that exact IP. HEADS UP The "HP Smart" app must remain installed and running in the background on at least one network device to handle printer discovery and driver updates reliably.

Question 3

scans come out crooked every time from the document feeder, even if i align the paper perfectly.

Accepted Answer

DIAGNOSIS The paper guides in the automatic document feeder (ADF) tray are misaligned or have debris in the paper path, skewing the page as it feeds. FIX Clean the ADF rollers. Open the ADF cover (lift the top scan bed). You'll see a set of white rollers. Wipe them with a damp cloth, then rotate them manually to clean all sides. Also, check the small plastic separation pad at the entry and clean any dust off it. IF THAT DIDN'T WORK The paper width guides in the AF tray might be too tight or too loose. Adjust them so they just touch the sides of your document without pinching or leaving a large gap. HEADS UP Scanning heavily textured, curled, or thin paper (like receipts) through the ADF will almost always skew. For those, use the flatbed glass.

Question 4

keeps saying 'out of paper' when the tray is clearly full, and the green light on the tray is blinking.

Accepted Answer

DIAGNOSIS The paper presence sensor (a small metal lever inside the tray) isn't being engaged, usually because the paper stack isn't pushing it up or the stack guides are too loose. FIX Remove the paper stack. Reseat it firmly against the right-side guide, then adjust the left guide to snugly touch the paper stack—you should feel slight resistance when sliding it. Push the tray fully in until it clicks. The blinking light should turn steady. IF THAT DIDN'T WORK The sensor lever inside the printer (at the back-left of the tray cavity) might be stuck. Power off, open the tray, and use a flashlight to look for a small plastic lever. Gently move it up and down a few times to free it. HEADS UP Loading paper above the "max fill" line (about 250 sheets) can bend the sensor mechanism, causing permanent false empty errors.

Question 5

it's making a loud grinding or clicking noise from the right side every time it picks up a sheet of paper.

Accepted Answer

DIAGNOSIS The paper pickup roller in the main tray is worn smooth or has paper dust/debris built up, causing it to slip and the gears to grind. FIX Remove all paper from tray 1. Lift the tray fully open and look at the rubber pickup roller at the back-right corner. Clean it with a lint-free cloth dampened with warm water. Rotate it to clean the entire surface, then dry it thoroughly before reloading paper. IF THAT DIDN'T WORK The separation pad (a small felt pad behind the roller) might be glazed. You can lightly roughen its surface with a clean pencil eraser to restore friction. Replace the paper; ensure you're not overfilling past the stack guide. HEADS UP This noise often gets worse with heavier cardstock or recycled paper. For best results, use standard 75-90 gsm paper and fan the stack before loading.

Question 6

the touchscreen on my hp laserjet tank 2604 is completely unresponsive, won't tap or swipe at all.

Accepted Answer

DIAGNOSIS The touchscreen's capacitive sensor has locked up, usually from a software glitch or static discharge. FIX Perform a hard reset. Unplug the power cord from the wall outlet. Wait 60 seconds. While it's unplugged, press and hold the power button on the printer for 15 seconds to drain residual charge. Plug it back in and power on. This forces a full reboot of the controller. IF THAT DIDN'T WORK The panel might need recalibration. As the printer boots up (HP logo on screen), quickly and firmly press the lower-right corner of the touchscreen three times. If successful, a calibration menu will appear—follow the on-screen dots. HEADS UP Using screen cleaners or ammonia-based wipes can permanently damage the touch sensor. Only use a dry, soft microfiber cloth.

Question 7

i just got a 2604sdw and it's printing super faint, like the toner isn't sticking, even though the tanks are full.

Accepted Answer

DIAGNOSIS The protective shipping tape inside the toner cartridge compartment wasn't fully removed, blocking the toner from reaching the imaging drum. FIX Power off the printer and open the front door. Pull out the black toner cartridge (the only one you install). Inspect it closely—you must remove TWO clear plastic tapes: one along the top edge and one wrapped around the cartridge's side/seal. Remove any remnants, reinsert firmly until it clicks, and close the door. IF THAT DIDN'T WORK The transfer roller (which moves paper through) might be contaminated. Power off, open the rear door, and look for a wide, gray roller. Gently wipe it with a lint-free cloth dampened with distilled water, then let it dry completely for 10 minutes. HEADS UP Never use isopropyl alcohol or standard cleaners on internal rollers; it degrades the rubber and makes the problem permanent.

Question 8

my hp tank 2604sdw printer screen just says 'scanning for network' forever and never connects to wifi, what do i do?

Accepted Answer

DIAGNOSIS Your printer's wireless setup is stuck in a loop, often caused by a mismatch between your router's 2.4GHz/5GHz network settings or a failed initial handshake. FIX Start with a full network reset on the printer. Go to the touchscreen: Setup > Network Setup > Restore Network Settings. Let the printer reboot. Then, reconnect using the HP Smart app on your phone/computer. During setup in the app, when it asks, connect your phone to the printer's direct "HP-Setup-xxx" Wi-Fi network—this method is more reliable than the touchscreen wizard. IF THAT DIDN'T WORK Your router might be blocking the connection. Temporarily disable the 5GHz band on your router (or give the 2.4GHz network a distinct name) and try the setup process again. The printer only works on 2.4GHz networks. HEADS UP After connecting, if you add the printer to a computer via Windows "Add Printer," it may create a duplicate, non-functional entry. Always use the driver installed by the HP Smart app.

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