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Caps lock continuous single blinking. Display not showing.

The laptop stated will not turn on and the caps lock is blinking. So far I have tried:

-taking the battery out and trying to turn on with charging cable inserted.

-reinserting battery and trying to turn on

-Cleaning the laptop

-Opening laptop, taking out Ram and re inserting.

-Switching which slot the ram is in

-And putting it onto a different monitor via hdmi slot

Does anyone have any ideas.

Thanks in advance.

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Hi @mrtea1245 ,

You said the Caps Lock is blinking continually but is there a pattern to the blinks, e.g. 2 blinks - pause - 2 blinks - pause or perhaps 3 blinks - pause - 2 blinks - pause - 3 blinks - pause etc?

If there is a pattern, here's a link to the HP blink error codes for laptops.

Click on the link to Beep and LED code descriptions and then select the link appropriate to your year model laptop. Click to expand and then find the code pattern and the problem description

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Hi @jayeff

Thanks for your reply.

The caps lock is blinking a single time every 5s which suggests it is the cpu if I'm correct.

How difficult is re seating a cpu in your experience,?

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Hi @mrtea1245 ,

Don't know your laptop but is the CPU the removable kind or is it permanently mounted onto the systemboard?

Looking at the service manual it appears that the CPU is mounted on the board and not removable

Try the 30 second power refresh and see if that has any effect.

Disconnect charger, remove battery, press and hold the Power button for 30 seconds then release the button, connect and switch on charger (leave battery out at this stage) and try to start the laptop.

If it starts, allow to boot all the way to the desktop, allow HDD activity to settle a bit then shutdown in the normal manner.

When completely shutdown, switch of and disconnect the charger, reinsert the battery, reconnect and switch on the charger turn on the laptop.

If it starts, allow it to boot all the way to the desktop, allow HDD activity to settle, check charge status of battery. if charging allow to fully charge before switching off and disconnecting charger so that the laptop runs on battery power.

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@jayeff

It is definitely not removable as you thought and the power refresh does not work unfortunately.

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Hi @mrtea1245 ,

OK.

Try removing/replacing the RTC battery to see if this resets the CMOS and you can then restart the laptop

Go to p.63 in the service manual and follow the pre-requisite steps and then the procedure to remove that battery.

Leave it out for 5-10 seconds and then re-insert (remember the orientation of the battery so that it goes back in the same way as it came out - not sure but usually +ve polarity marking is on top when in situ but check before you remove it),

Replace all the other parts removed in the pre-requisite steps and then try to start the laptop.

If still no good it may be the CPU or the motherboard - if so commiserations

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