Why does my BIOS display error 502 at startup and how to fix it? (read desc. for more context)

[BlestLace]

It's been a while since this started (4 months ago), but whenever I turn off my computer and remove the cable, when I reboot, it annoyingly black screens for ≈45 seconds and then displays an error message.

This bothers me a lot and I can't seem to find out why this is happening. I've read the documentation on it but it doesn't help because it tells me to "recover the bios" which confuses me.

My question is: How to fix it and why is this happening?

Any help would be greatly appreciated!

[Irwin6]

Hi @BlestLace,

Welcome to HP Support Community.

Thank you for posting your query, I will be glad to help you.

I see that you are facing an issue with your PC that has a error code 502.

Follow the below steps to fix the issue.

-Perform a drain on your PC.

1) Unplug the power cord from the PC & wall.

2) Disconnect the power cable from the AC adapter if it is a detachable part and keep it aside.

3) Press and hold the power button down for 15 seconds and release the power button, wait for about 30 seconds.

4) Plug the power cord back into the AC adapter, then connect it to the wall and to the charging port on your PC.

5) Power on the PC and update the BIOS for your PC by clicking on the link and let me know if that resolves the issue.

Make sure you keep only the charger plugged in while updating the BIOS for your PC.

Click on the + sign next to BIOS and then download the file.

Open the file and follow the on-screen instructions to complete the update.

-Refer to this link for reference.

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

I hope this helps.

Take care and have a great day ahead!

Irwin6

HP Support

[BlestLace]

Hello again!

This answer worked for me, thank you!

[Irwin6]

Hi @BlestLace,

That's great! Happy to hear that the issue has been resolved. I appreciate your efforts in performing the steps to fix it and If you need further assistance feel free to reach out to us.

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

Take care and have a great day ahead!

Irwin6

HP Support

[BlestLace]

Hi!

I did not expect to reply to this query, but it seems that the problem persists.

(PS: This happens on every reboot after power has been cut for a long time. Also, on every error start like this one, the time is always very wrong.)

Thank you for your assistance!