Desktop won't start and has no blue lights

My pavilion elite desktop has had a high pitch noise since I bought it. I read that the video card could cause that so I got a new video card but it made the same sound. I tracked the sound down to the psu. I returned the video card and got a new psu. The noise is got but the machine doesn't boot up now. All fans come on but no front panel lights no keyboard lights no monitor output. Tried putting the old psu back in. The noise was back but still no boot. I tried removing each piece of hardware till all I had was memory and hd left and still no lights. I swapped memory locations, sata cables, tried the card reader trick. Nothing seems to work. Could a blown led for the front panel cause it to not boot? That's the only connector I have left since I need it to power on.<br><br>Thanks for any ideas.

Hello @Zakk1998,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand that after replacing your power supply your computer will no longer boot up. To assist you with this I am providing you with an HP Support document: Replacing the Power Supply in HP and Compaq Desktop PCs, which will walk you through the replacement process. I suggest you review the document and ensure that everything is connected the way it is supposed to be. I am also providing you with an HP Support document: Troubleshooting Power Supply Issues, which you can use to troubleshoot your power supply if you have follow the first document and still have the same issue.
If at the end you are still having an issue with your computer's power supply I would advise you to call our technical support at 800-474-6836. If you live outside the US/Canada Region, please click the link below to get the support number for your region. http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html.
I would like to thank you for posting on the HP Forums. Have a great day!
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.
Dunidar
I work on behalf of HP
Find out a bit more about me by checking out my profile!
"Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong." ~ Donald Porter

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Desktop won't start and has no blue lights

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