My laptop screen went blank and the caps lock button is flashing twice

[Ngubeni]

Hi Members, kindly assist me with my old laptop issue. Is is a Compaq Cq58 windows 8. The model serial number:[EDITED]. The laptop screen just went blank and the caps lock button is flicking twice. The issue started yesterday. 

[Max3Aj]

@Ngubeni, Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 
I understand your Compaq CQ58 laptop is showing a blank screen and the Caps Lock LED is blinking twice repeatedly. This is a known diagnostic code from HP that indicates a BIOS corruption failure.

Here are the steps you can follow to try and resolve this issue:

Perform a Hard Reset

1. Turn off the laptop completely.
2. Disconnect the power adapter.
3. Remove the battery (if removable).
4. Press and hold the Power button for about 15 seconds.
5. Reconnect the battery and power adapter.
6. Try turning the laptop back on.

Attempt BIOS Recovery

HP laptops have a built-in BIOS recovery feature. Here's how to try it:

1. Turn off the laptop.
2. Press and hold the Windows + B keys, then press and hold the Power button for 2-3 seconds.
3. Release the Power button but continue holding Windows + B for another 5 seconds.
4. If successful, you should see the BIOS recovery screen and the system will attempt to restore the BIOS.

If this works, follow the on-screen instructions to complete the recovery.

Reseat RAM (Optional but Helpful)

Sometimes, reseating the RAM can help resolve POST issues:

1. Power off the laptop and remove the battery and power adapter.
2. Open the back panel to access the RAM.
3. Carefully remove and reinsert the RAM modules.
4. Reassemble and power on the laptop. 

I hope this helps. 

Take care and have a good day. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Select "Yes" on the bottom left to say “Thanks” for helping! 

Max3Aj

HP Support