I attempted to update my Windows 11 last night since my PC was already having issues. I downloaded the official setup from Microsoft and started the installation process. It went to the point where it says, "Your PC will restart several times. This might take a while." However, after the first restart, my PC never booted again. Now, only the CPU and cabinet fans turn on, the GPU powers on briefly and then shuts off, and there's no display or POST screen. The system doesn't even reach the BIOS. I've tried booting with minimal hardware (just one SSD and one RAM stick), but nothing seems to work. Here are my specs: 16GB Corsair DDR5 RAM, 2TB Seagate hard disk, Intel Core i7-12700K processor, and MSI B760M Mortar WiFi II motherboard.
5 Answers
I suspect you might have hit a coincidental hardware issue that isn't related to the Windows installation itself. Just to be safe, unplug your power supply, hold down the power button for 30 seconds to discharge capacitors, and then plug it back in to see if that helps. If you have access to a multimeter or a spare PSU, testing those could also give you some insight.
I think what you’re dealing with is likely more hardware-related. It’s possible there might have been a thermal issue or power supply problem. Make sure all connections are solid, especially the ones going to your GPU. If your CPU has integrated graphics, consider removing the GPU completely to see if the system powers on.
Try disconnecting everything except for the CPU, cooler, and fan. Remove the CMOS battery, and then short the reset pins for about 5-6 seconds. Power it on again using the power header pins. If it works, you should at least see an error for missing RAM. It's a solid way to see if your motherboard or PSU is functioning properly.
If you're still not getting anywhere after that, check to see if your motherboard's debug lights indicate anything. If they do, it could help pinpoint the problem. Also, clearing the CMOS might help – you can do this by either pressing the dedicated button on some boards or using jumpers.
It sounds like your BIOS settings might be causing the issue, but it's unlikely the Windows installation borked it. An easy first step is to plug your monitor directly into the motherboard to see if you can access the BIOS. Sometimes, the GPU might not be properly seated or could be faulty, so that’s worth checking too.
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