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400CX Problem


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So, my HP Pavillion a747c wouldn't power on after I transported it from school to home. I saw no noticeable damage to the motherboard, so I bought a new power supply (the 400CX). After it was delivered I installed it, making sure all the connections were secure. I still couldn't power on my PC. After some frustration, I put the old one back in and discovered that by doing some seemingly random plugging/unplugging of the power cables, I can get my PC to power up with the old PSU. However, I would much rather use the 400CX as it has a PCI-E cord for my GPU. The odd plug/unplug trick doesn't work for the 400CX.


I'm just wondering if anybody has any suggestions as to what the underlying problem is and why my 400CX won't work.

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