I am receiving an error code of 0XB03687E4 on my HP Officejet 4635

[Patrick420]

First, my HP Officejet 4635 printer wouldn't print any print jobs until I went in and cleared out all print jobs in Queue. Then it worked for a couple of days and then all of a sudden the printer wouldn't even turn on. I unplugged it and plugged into a different outlet and then it worked for 2 days, and now I have  error code of 0XB03687E4.

[Max3Aj]

@Patrick420, Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 
The error code 0xB03687E4 on your HP Officejet 4635 typically indicates a hardware or firmware-level malfunction, which could stem from internal electronics, the print head, or corrupted firmware.

Given your printer's behavior (intermittent power issues, queuing problems, now this error), this points to a deeper internal fault, but here's a step-by-step to try and resolve it or confirm the issue:

Power Reset the Printer

• This clears any residual charge and resets internal memory:
• With the printer on, unplug the power cable from the back of the printer.
• Unplug it from the wall too.
• Wait 60 seconds.
• Press and hold the power button on the printer (if available) for 15 seconds (discharges residual power).
• Plug it back in directly to a wall outlet, not through a surge protector.
• Turn it on.

Check for Jammed Parts or Cartridge Issues

• Open the printer lid and remove the ink cartridges.
• Check for any stuck paper, debris, or jammed print head.
• While cartridges are out, plug in and turn on the printer—see if it boots without the error.
• Reinstall cartridges one at a time to test if one triggers the error.

Firmware Reset (if accessible)

• If the printer boots enough to access the touchscreen:
• Tap Setup (wrench icon) > Printer Maintenance > Restore Factory Defaults (or similar).
• If you see an "Update Printer" option, try updating the firmware.

Use HP Print and Scan Doctor (Windows)

• If it turns on and is connectable: 
  Official HP Print and Scan Doctor for Windows | Free Download hppsdr.exe
• It can run deeper diagnostics and might attempt a firmware recovery. 

I hope this helps. 

Take care and have a good day. 

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Max3Aj

HP Support