@Neil0068, Welcome to HP Support Community.
Thank you for posting your query, I will be glad to help you.
If all lights are blinking on your HP DeskJet 3630 All-in-One printer and the 'E' is flashing on the control panel, this usually indicates a serious error condition. It’s often related to:
- Cartridge issues
- Paper jam
- Scanner error
- Firmware or hardware failure
🔍 Try These Steps to Diagnose & Fix:
Check for Paper Jams
- Open all accessible areas (input tray, output tray, cartridge access door).
- Remove any jammed paper or bits stuck inside.
- Turn the printer off and back on.
Check Ink Cartridges
- Open the cartridge access door.
- Wait for the carriage to stop moving.
- Remove both cartridges and check:
- Are they properly seated?
- Are you using genuine HP cartridges?
- Any tape left on the contacts (if newly installed)?
- Any ink leakage or damage?
Reinsert them securely and close the door.
Reset the Printer
- With the printer turned on, unplug the power cable from the printer.
- Unplug from the wall outlet.
- Wait 60 seconds.
- Plug it back into a wall outlet directly (not a surge protector).
- Reconnect to the printer and turn it on.
Check for Specific Blink Pattern
- If the 'E' is blinking, usually an error code number follows (like "E1", "E3", etc.).
- Try to spot any number shown briefly after the E— this can help pinpoint the exact issue.
Update Firmware (if possible)
If it powers on normally for a short time:
- Go to HP Driver & Software page for the DeskJet 3630.
- Download and install the firmware update.
You may refer to this document - HP DeskJet 3630, 4720 Printers - Blinking Lights | HP® Support
I hope this helps.
Take care and have a good day.
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Max3Aj
HP Support