Solution

It was probably my motherboard. I got a new CPU and motherboard and it worked. I also upgraded from DDR3 to DDR4 ram in the upgrade process

Background

So my computer is not posting, and I am unsure the cause. I am not getting an error code, so that complicates things. I do not know if this motherboard will provide post codes, it does not have a seven segment display for providing post codes.

How it started

It just randomly stopped displaying any pictures, unsure if it happened while in use or when the computer was asleep. I was doing stuff at my desk and had music playing on my computer. The music ended and I did not put on more music and the monitors went to sleep. Later when I went to use my computer It did not appear to wake up, I tried fully shutting down and turning on my computer, and that is when this problem occurred.

Symptoms:

• When I power on, computer appears to start normally, with all fans spinning so power delivery appears to be working. Even GPU fans are spinning.
• Holding down the power button turns the computer off as normal.
• Nothing is displayed on the screen, my monitors do not even detect an input.
• USB devices do not appear to be powering on.
• Every minute or two, the GPU fans ramp up briefly, and then ramp down. It may be all fans are ramping up, kind of hard to tell exactly which fans are ramping up.
• With the AMD GPU, the LEDs for power turn on. However, I vaguely recall the GPU itself having some RGB when the system was running that was not on. How my computer was setup I did not see inside my case that often, so the RGB on the GPU is a vague memory from a few years ago and I would not put much weight in there being some RGB.

Hardware:

• MOBO: Gigabyte 9900FXA-UD3
• CPU: AMD FX-8350
• GPU: ASUS Radeon HD7870 or EVGA GTX 970
• PSU: Cooler Master Elite V2 550W

Troubleshooting Attempted:

I initially assumed it was GPU related as the computer appears to turn on normally, but then nothing is displayed. So another user shipped me his old GPU (the GTX 970), and I swapped it out with my old one, and the problem persists.

I tried swapping out the RAM

I tried a brand new PSU and that also did not solve the issue

Leading hypothesis

Since I have changed everything out except CPU and MOBO, I am thinking it is probably my MOBO. I am currently researching my options for replacing my MOBO, or a friend offered me his CPU and RAM from his old rig with a broken MOBO that may be a better option than replacing mine.

Solved!

Thanks to @pseudolobster's post here, I was able to resolve the issue by creating a new user account on the computer. I'm leaving the post up for posterity, in case anyone else is ever searching up this same issue in the future.

My husband is starting to transition to work from home. He is using his personal computer and just yesterday set up a VPN, Microsoft Teams, and Windows' built-in remote desktop so that he can access his work computer. Everything worked smoothly and he was able to finish out his workday from home just fine.

Primary Issue

This morning, upon booting his computer, he cannot access his Start Menu. It is on screen, and it appears clickable, but nothing comes up. Likewise, the search bar in his task bar is present on boot, but upon clicking the start menu for the first time it disappears and does not return. Other basic Windows functionality seems to be broken. Alt-tabbing does not work to switch between windows. System tray icons are present, but right clicking them and selecting an option does nothing. We cannot open taskbar settings or network settings this way, for example.

This might be indicative of a larger breakdown. Even by command line, I can't get to the Windows 10 settings or Windows Update. It seems like all of the "new Windows"-style interfaces won't start (though the old ones, like the Control Panel, do).

We can still open up apps by clicking on the links in his taskbar, and those seem to work fine. I can also get to the run command with Win+R.

He is running Windows 10, and as far as I know, it's fully up-to-date (I can't open Windows Update to check).

Additional Information

In attempting to diagnose this issue, I've come across several others that are potentially related. I don't know if these are relevant and they're not a primary concern at the moment, but I'm including them here in case they help contextualize what's going on.

There seems to be a runaway process that slowly eats up more and more memory over time, as well as a chunk of CPU. Sometimes it's called "Service Host: Windows Push Notifications User Service_#####" and sometimes it's called "Service Host: WpnUserService_#####" with the numbers changing each boot.

Also, in attempting to restart the computer, it sometimes (but not always) pauses with a notification about programs still running, with one of them being "Task Host Window" with the message Task Host is stopping background tasks. (\Microsoft\Windows\Plug and Play\Device Install Reboot Required) Finally, immediately before restarting, it shows an error message from "svchost.exe" which reads The system detected an overrun of a stack-based buffer in this application. This overrun could potentially allow a malicious user to gain control of this application.

Is this potentially a malware/intrusion issue?

Attempted Solutions

I have tried, to no success:

• Rebooting the computer, both via a restart in Windows as well as by holding down the power button
• Signing out and back in to his user account on the computer
• Running sfc /scannow
• Running DISM.exe /Online /Cleanup-image /Restorehealth

Request for Help

I know we have a lot of techy people here, but I also know you are all probably busy with everything that's going on. Nevertheless, if anyone has any guidance or help they could give on this issue, I'd greatly appreciate it.

Also, it's been a while since I've used Windows, but IIRC there's a way of just resetting the whole thing and starting fresh? That's not ideal, but if that's the course of action I need to take, just let me know. Ultimately I just want this to work, by whatever method, so that my husband can be at home and reduce his exposure.