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Computer wont turn on

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hp Pavillion 24 all in one 3la02aa#aba

I tried restarting it, rebooting it, all the steps I could find online and nothing works, all I hear is the power block or whatever u call that making a high pitch noise when I get close but the computer wont do anything 

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I used my own All-in-One for a year and have regularly been using another one for several years and I never noticed any sound coming out of the power brick -- which implies that your is going bad or has failed.


Unfortunately, you have a catch-22 at present because without a working PC, there is no way to test the power brick.


You would have to see about replacing it and then see if the PC starts properly.

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