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MarKomus
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Power will not turn on

HP Recommended
Pavilion 24-xa0053w
Microsoft Windows 10 (64-bit)

Hello!

My computer won't turn on when I press the power button.

Here are some things I've tried:

1) Unplug power cable. Press and hold power button for several seconds.

2) Replace the power adapter (all power adapters are genuine hp. The original was making a clicking sound, so I'm keeping the new power adapter).

3) I'm somewhat tech savvy, so I opened up the back and tested the continuity of the ribbon connecting the power button board to the motherboard. No problems.

4) On a hunch, I tested the CMOS battery and found it to be depleted. I installed a new one and repeated number 1.

5) I checked voltages across the motherboard's power connector and found them to be normal (neg, 3.3v, 3.3v, 5v).

6) I tried shorting the different connectors and the only response was the LED light on the power button lighting up (neg -> 3.3v)

Other notes:

1) When I plug the new adapter in, the steady "ready" light comes on by the adapter interface, so that's normal and not a change from the old adapter. But, like I said, I heard a clicking sound in the old one, so I'm leaving nothing to chance on that one.

2) Also, when I plug the new adapter in, the power button light flashes once, indicating that power is getting to the power button board.

3) When I run a continuity test on the power button board, I find that all the lines test negative for continuity.

 

In light of all the above, should I presume the button is faulty? Or is there another solution I'm not familiar with?

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