So I'm working on a friend's computer (HP EliteDesk 800 g1) and right outta the gates I realized his power supply fan wasn't working - ordered him a replacement and got it in correctly. Before I even opened the computer up to work on the power supply however, I noticed that on startup, the computer would beep 5 times, (all same length beep and same pause in between), the power indicator doesnt blink to accompany the beeps however, just the beeps. The monitor remains blank, keyboard isnt cutting on, mouse isnt lighting up. Could a component have gone bad while he was running it without a power supply fan? I've searched high and low for beep codes and I've tried all the obvious fixes with the exception of replacing the video card (its currently integrated), or the HDD. Any advice would be much appreciated, as the only results I can find are beeps accompanied by LED flashes, to which I have none. Even so, the LED flashes / beeps (5) say it should be either a power supply issues (fixed) or a memory issue (tried using 2 sticks from another computer of the same kind and nothing).