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[Jp_13]

When I turn on my laptop it will not start up, it gives me a quick screen about cmos reset 502

[Elohi_NR]

Hi @Jp_13,

Welcome to the HP Support Community. 

I'd be glad to help you! 

I understand the  CMOS reset 502

Let's try some steps to help you.

HP Recommended Solution: HP PCs - 500, 501, or 502 error displays on a blue screen 

Reset the CMOS

In some cases, the automatic BIOS recovery fails because the Complementary Metal Oxide Semiconductor (CMOS) data is corrupted. The CMOS stores BIOS settings. Use this procedure to reset the CMOS and recover the BIOS.

Turn off the computer.

Press and hold the Windows + V keys, and then simultaneously press and hold the power button. After 2 to 3 seconds, continue to press and hold the Windows + V keys, but release the power button.

When the CMOS Reset screen displays or you hear beeping sounds, release the Windows + V keys.

At the completion of a successful CMOS Reset, a message similar to the following one is displayed.

Press enter to restart the computer. 

If this does not recover your computer, see Recover the BIOS.

If the issue persists, I'm afraid it's a hardware issue. Please contact HP phone support regarding the service/replacement options.

Hope this helps! Keep me posted for further assistance

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