I had to take apart and rebuild my computer recently and (for a couple of weeks) it was working perfectly fine. The only new parts are the tower and power supply. I left it on to download a game overnight and when I got up this morning I couldn't boot it up. After checking the connections I was able to start it up for a while but there was no display to my monitor. I tried connecting an HDMI cord and that didn't work either. I then tried connecting the monitor to my laptop with that same HDMI cord and the monitor was able to display it with no problem. I then tried removing the ram sticks, cleaning them, and cleaning the slots but still no luck.
During these repeated boots and troubleshooting I noticed the computer started to shut itself down after a bit and, I think, a hard drive inside started clicking while it ran (though not the drive the operating system boots from). I tried reapplying the thermal paste twice with no luck. I also tried a different power supply cable and outlet. Powering the computer on from the button on the motherboard seems to keep it on longer than the tower button, but only by 30 or so seconds. Lastly, when it does shut itself down I can't power it back on without flipping the power supply switch in the back.
Any ideas on what the problem could be? I've spent most of the day looking up videos and forums for troubleshooting and I don't know how to really tell if it's an issue with the power supply or the CPU. I'm hoping that this sounds like a specific issue to someone more experienced than me. Between the display issues and the shutting off I'm leaning towards the power supply, but I wanted to ask here first before purchasing a new one. Thanks.
During these repeated boots and troubleshooting I noticed the computer started to shut itself down after a bit and, I think, a hard drive inside started clicking while it ran (though not the drive the operating system boots from). I tried reapplying the thermal paste twice with no luck. I also tried a different power supply cable and outlet. Powering the computer on from the button on the motherboard seems to keep it on longer than the tower button, but only by 30 or so seconds. Lastly, when it does shut itself down I can't power it back on without flipping the power supply switch in the back.
Any ideas on what the problem could be? I've spent most of the day looking up videos and forums for troubleshooting and I don't know how to really tell if it's an issue with the power supply or the CPU. I'm hoping that this sounds like a specific issue to someone more experienced than me. Between the display issues and the shutting off I'm leaning towards the power supply, but I wanted to ask here first before purchasing a new one. Thanks.