Re: Trying to repair a HP Z800 850W PSU by Delta

My old trusty Z800 started randomly shutting off with no warning. I assumed power supply problems and found this thread. I visibly checked all the caps, cleaned out a ton of dust, etc., to no avail. I did not want to start changing parts willy-nilly without knowing the cause.

Then, quite by accident (thanks to almost getting burned) I discovered that the graphic card was extremely hot. Its fan was very stiff and barely turning, probably either from wear or accumulation of fine dust within. At some temp it seems the system...