Compaq CQ56-115DX Recalled Power Supply & Dead Motherboard

Hello,
We currently have a Compaq CQ56-115DX in our shop that we are diagnosing. Currently the computer turns on and sits at a black screen while the caps lock light blinks repeatedly. Upon further research we have found that it may have an issue with the bios. We are unable to get anywhere past that black screen so we cannot update the bios. We have tried pulling the CMOS battery and letting it sit for a bit in hopes that it might reset the bios. Unfortunately that didn't work. We believe the motherboard is bad. Looking at the support page for more resources I saw that there was a recall on the power supply for this machine. I went through the confirmation pages and the adapter is one of the affected models. Is there a possibility that the power supply could have caused the motherboard issue?
Thanks,
ST

It is actually a recall on the cord from the power supply brick to the wall plug, not the brick itself. If that goes bad you just get no power at all so the power supply is not the likely culprit. Is there any evidence of melting or arcing on the power supply at the place where the wall cord plugs into the brick? Does it put out power to specs? I would agree with your motherboard diagnosis, by the way.

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Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
Also be sure to mark my post as “Accept as Solution" if you feel my post solved your issue, it will help others who face the same challenge find the same solution.
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I work on behalf of HP
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Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
Also be sure to mark my post as “Accept as Solution" if you feel my post solved your issue, it will help others who face the same challenge find the same solution.
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Hello,
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If you live in the US, contact HP Here.
If you are in another part of the world, start Here.
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DP-K
****Click the White thumb to say thanks****
****Please mark Accept As Solution if it solves your problem****
****I don't work for HP****
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