My printer 4520 won't turn on

[snowstorm]

Printer has been without a laptop connection for a week and now it won't turn on

[A4Apollo]

Hey there! @snowstorm, Thanks for stopping by the HP Support Forums! 

I understand you have issues powering on your printer.

Don't worry I'll to help you out.

Did you make any changes to your printer?

Have you tried checking with a different power chord or a different wall outlet?

As you mentioned you have issues powering on your printer.

Try the steps recommended below.

Turn on the printer.
Wait until the printer is idle and silent before you continue.
Disconnect the USB cable from the rear of the printer. If your printer has a network or wireless connection, leave it connected.
Remove the ink cartridges from the printer.
With the printer turned on, disconnect the power cord from the rear of the printer and from the wall outlet or power strip.
Wait at least 60 seconds.
Plug the power cord back into the wall outlet.
   NOTE:
HP recommends connecting the printer power cord directly to a wall outlet.
Reconnect the power cord to the rear of the printer.
Turn on the printer, if it does not automatically turn on.
The printer might go through a warm-up period. The printer lights might flash, and the carriage might move.
Wait until the warm-up period finishes and your printer is idle and silent before you proceed.
Reinsert the ink cartridges, and then close the ink cartridge access door.
If you receive a prompt to print a calibration page, do so.
If you disconnected the USB cable, reconnect it to the rear of the printer.
Try to print.

Test the printer Power button
Plug the printer into a working wall outlet, and then test the Power button on the printer.
Make sure the power cord is connected to the rear of the printer and is plugged directly into a wall outlet.
Press and release the Power button to start a Power On/Off cycle. Do not hold the button down.
   NOTE:
If you press and hold the Power button too long, the printer might turn on and then off without restarting. If this happens, press and quickly release the Power button again.
If the printer does not turn on, wait 10 seconds, and then press the Power button again.

Refer this article to further troubleshoot no power issues with your printer. Link: https://hp.care/2rixHS1

If the issue still persists after trying out the steps.

It is a hardware issue with your printer.

Please contact HP support for service options.

Link to contact HP.

If the solution provided worked for you, please mark accepted solution for this post.

Let me know how it goes!

Take Care! 🙂

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