my canon pixma tr8620a printer is stuck in standby mode and won't wake up, anyone else have this?

Diagnosis

The "stuck in standby" state on the Canon PIXMA TR8620a is typically a result of a communication deadlock between the printer's internal logic board and the network interface. This occurs when the printer receives a malformed print command or a "half-packet" data stream via Wi-Fi, causing the firmware to hang while waiting for the rest of the data. Because the printer believes it is actively processing a request, it refuses to enter a full "Wake" state or respond to physical button presses on the control panel. You can confirm this is a software-level hang if the power light is illuminated but the OLED display remains dim or unresponsive to the "Stop" or "Home" buttons. In many cases, this is exacerbated by the "Auto Power On" feature, which attempts to wake the device from a deep sleep state but fails because the network handshake is corrupted. If the printer is connected via a 5GHz network while the device is struggling with 2.4GHz interference, the standby loop becomes more frequent.

How to Fix It

To break the logic loop and force a hardware reset of the TR8620a, follow these precise steps:

1. While the printer is "on" (even in standby), press and hold the Power button for 5 seconds until the unit shuts down completely.
2. Physically disconnect the AC power cord from the back of the printer and unplug it from the wall outlet. This is critical to drain the capacitors on the main board.
3. Leave the printer unplugged for exactly 120 seconds. Do not plug it back in sooner, as the volatile memory needs time to clear.
4. On your computer (Windows or macOS), open the Print Queue. Right-click any pending documents and select "Cancel" or "Remove All Documents." If a job is stuck as "Deleting," restart your computer to clear the local spooler.
5. Plug the power cord back into the wall first, then into the printer.
6. Power the unit on. When the OLED screen initializes, immediately press the "Home" button to ensure the interface is responsive before sending any new print jobs.

If That Didn't Work

• Perform a Network Reset: If the standby issue is caused by a DHCP conflict, navigate to the Setup menu (gear icon) > Device Settings > LAN settings > Reset LAN settings. This clears the cached IP address and forces the printer to request a new identity from your router, which often clears the "wake-up" blockage.
• Disable Auto Power On: Navigate to Setup > Device Settings > Energy saving settings > Auto Power On. Toggle this to "OFF." Many TR8620a users find that the automatic wake-up trigger is the primary cause of the standby freeze; manually powering on the device prevents this firmware glitch.
• Update Firmware via USB: If the printer is stuck in a loop, Wi-Fi updates may fail. Connect the printer to a PC via a USB A-to-B cable. Use the Canon update utility to check for firmware versions beyond v1.11. Firmware updates specifically address "communication stability" which directly impacts standby behavior.
• Assign a Static IP: Use the printer's web interface (type the printer's IP address into a browser) to change the IPv4 settings