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‎04-20-2020 08:22 PM

HP Recommended
Product: Example: Probook 450 G2
Operating System: Microsoft Windows 7 (64-bit)

My laptop does not start and power and caps lock button on with charging led blinking. i tried to reset bios by win key+B with power button. But nothing happen.

  • Some days ago same problem solved by win key+ B+ Power button. But today i failed.
  • In one step i found a screen shows that bios error 504 occured.
  • Pls help me. Thanks in advance.
1 REPLY 1

‎04-21-2020 03:20 AM

HP Recommended

Hi
Hopefully one of these documents will cover (and solve) your problem...
https://support.hp.com/ca-en/document/c00042629
https://support.hp.com/us-en/document/c02693833
https://support.hp.com/us-en/document/c04126730

 

I would wonder about the state of the CMOS/RTC battery, and whether it want a new one?

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