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‎01-12-2019 11:03 AM - edited ‎01-14-2019 09:50 AM

HP Recommended
Product: Pavillion 590-p0066
Operating System: Microsoft Windows 10 (64-bit)

Hello! I upgraded my PSU from 310W SFF to a 400W SFF, purchased from HP Parts, to accomodate a new graphics card. Everything works great, but about once a day the computer just shuts off. I have to unplug the power supply for a few minutes and reconnect then restart. The graphics card is staying cool and fans are functioning properly. I have noticed, however, that the PSU fan NEVER spins at start up, at shut down, during operation, never. This power supply, like the original 310W, has the proprietary 7 pin motherboard connector. The difference is that the original PSU only had 3 actual wires on the 7 pin connector while the 400W has a ll seven filled. Could the extra 4 wires be causing a communication problem with the motherboard, or did I just get a defective PSU?  What are the other 4 wires used for? Any help you can give would be appreciated. Thanks.

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