PC wont boot, How to track down why

[mattyg]

So, My "aging" 5950 desktop wont boot into windows after an update.

It will boot randomly and then all is good until I reboot it again, Then we go into a loop. Even after the normal 4 0r 5 goes when it offers a recovery menu screen it'll often just hang. It wont boot into safe mode (just hangs)

I've 6 monitors connected and only 3 turn on when its failing to boot. But when its going to work the others then turn on. Could this mean its a GPU issue. its got a 1070 and a 1080 installed.

What would be the first steps to try and narrow it down.

It recently had a new 990 m.2 installed as i was getting some errors. It ran fine until an update.

I get random disk check screens or undoing update screens or just hangs at the bios/ windows starting to load wheel screens

 

[mattyg]

Have you checked event viewer to see if there is any errors in there that may help?

When I last got it to boot. I checked, Loads of warnings and a number or errors. BUT, It finally finished downloading the win11 repair install so ran that and not got it to boot since........

I'll start by stripping everything off it and try the onboard graphics.. I also get a device is missing error

 

[mattyg]

Can you get into BIOS menu on every go?

Yeah, can get into bios

 

[mattyg]

Can you boot into safe mode?

Generally after I give up with OS repair a couple of times and just do fresh, probably less time lol. About 5 minutes to reinstall windows.

No, It wont go into safe mode. Just starts that hanging procedure again..

 

[mattyg]

Its "feels" like its hardware. I've disconnected the monitors going to the 1080 and it now boots everytime. But it'll hang at the windows login screen if i dont log in. If i fully boot into windows it all acts normally until a sudden reboot after maybe 5 mins.
Event viewer is showing these as Critical Kernel-power issues.