Compaq Blinking caps lock black screen

[NWillis77]

When I press the power button the notebook starts to start but doesn't, instead the screen is black and the caps lock blinks. It blind 1 time the pause and again 1 time then pause and repeat. I've tried taking out the battery and ac adaptor and pressing the Pee-wee button for thirty seconds and restarting, still nothing. I've taken out the two chips in the back and gently wiping them off still nothing. I've tried restarting pressing the arrow keys, nothing. I've tried restarting pressing f8, nothing. And restarting pressing down with my palm around the t, y, u, i, o, 7, 8, 9, etc area, still nothing. According to the blinking code, it was said that is was a CPU Failure and to contact support.

Thank you in advance.

[A4Apollo]

Hi! @NWillis77, Thanks for stopping by the HP Support Forums!

I understand when you power on your laptop the laptop boots into a black screen and the light on the caps lock is blinking one time repeatedly.

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

Did you make any software or hardware changes on your PC?

Are you able to access BIOS or F2 system diagnostics on your PC?

Do you get errors on the black screen?

I appriciate your efforts for trying out the steps before reaching out to us.

As you mentioned when you power on your laptop the laptop boots into a black screen and the light on the caps lock is blinking one time repeatedly.

This indicates the CPU on your laptop is non-functional. Please contact HP support for service options.

Refer this article to know more information about blinking lights on your PC.

However, Try few steps recommended below try these steps and check if it helps.

To perform a hard reset on a computer with a removable battery, use the following steps:
Turn off the computer.
Remove the computer from any port replicator or docking station.
Disconnect all external connected peripheral devices such as USB storage devices, external displays, and printers.
Unplug the AC adapter from the computer.
Remove the battery from the battery compartment.
Press and hold down the Power button for about 15 seconds to drain any residual electrical charge from the capacitors that protect the memory.
Insert the battery and plug the AC adapter back into the notebook computer, but do not connect any of the peripheral devices.
Press the Power button to turn on the computer.
If a startup menu opens, use the arrow keys to select Start Windows Normally, then press the Enter key.
After reconnecting each of the peripheral devices, run Windows Update and HP Support Assistant to update all device drivers. See Updating Drivers and Software with Windows Update (Windows 10, 😎 and Using HP Support Assistant (Windows 10, 8, 7) for more information.

If you are able to access system diagnostics (F2) try running a system diagnostics test on your PC and check if the hardware components are working fine.

Also, if you are able to access BIOS try restoring the BIOS to default and check if it helps.

Turn on your PC keep tapping the F10 key, you will boot into BIOS.

From the main or file menu select restore defaults.

Select F10 to save changes and exit.

If the issue still persists after trying out the steps.

It is a hardware issue with your PC, 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 if this helps!

Take Care! 🙂

Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.

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