Error: Unsupported adapter installed

[BQueen1]

Hi all, 

My all in one HP computer fell and the screen broke. whenever I try to turn it on, the PC does not come on, instead, it makes loud beeping noises and the keyboard also does not power on. I sent it for repairs and the screen was fixed. However, whenever I try to turn it on it still makes the loud beeping noise with a blank screen, the keyboard or mouse also do not power on. A few seconds later, it comes on with an error message: "Unsupported adapter installed. PC will automatically power down in a few seconds. Keyboard error". Same as it was before I sent it to be fixed. I noted these issues in the form sent by HP describing the situation. 

[praveenbv]

Hi@BQueen1,

Welcome to the HP Support Community.  

Don’t worry, I assure you I will try my best to get this sorted.

I recommend you follow the below steps and check if it helps

Do you see a light at the place where the charger connects to the laptop? If yes then it indicates that the charger is all fine.

I recommend you to perform the following steps to isolate the issue and arrive at a fix: 

• Remove the battery out. If the battery is integrated and does not have a latch to release it then leave the battery inside the laptop.
• Disconnected AC adapter from the laptop.
• Press and hold the power button for 15 seconds.
• Reconnect the battery and plug the AC adapter.

F6 + Power Button

• CMOS Rest ( combination of windows button and letter 'V' then push the power button ones and release the windows and letter 'V' after 5sec

If the laptop does not power on then please continue with the below steps:

• Disconnect the charger and remove the battery out.
• Connect only the battery and check if the laptop powers on.
• Likewise, remove the battery out (if removal battery ) and connect only the charger, and check if that helps.

Hope this helps! Keep me posted.

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Have a great day!