So, an explanation of how I got to this point:
Dell Optiplex 990, 14GB RAM, NVIDIA Geforce GT 730 w/ 2 monitors, Windows 10; used for CAD
A week ago, we had multiple power outages in a row, while my machines were on. When when I logged back in to one of them (the one without a surge protector, SMH) , there were no desktop icons, mouse movement was normal, but clicks and keyboard input were extremely delayed (took a couple of minutes to open task manager). The screen would blink black about once per minute, and I got an application error (see attached). When I let it sit for several minutes (I went away for about 1/2 hour), the desktop icons eventually appeared. Searches for the error turned up nothing useful.
I tried to open Windows in safe mode, but I kept getting a “critical process died” BSOD, and attempts to auto-repair were unsuccessful.
Thinking it might be a bad HDD sector or something, I ran chkdsk /r and went back to “normal” Windows, but now it was blinking black about once per second.
Since chkdisk affected the behavior, I started thinking that it might be the hard drive. I needed a bigger one anyway, so I went ahead and ordered one. I cloned the drive and installed it, but continuously got a BSOD before it could get to the login.
At this point I had lost a couple of days of work, and now wasn’t sure if it was even the hard drive, so I went to my local used Dell supplier and got the exact same Optiplex 990 ($100, worth the try). It had a fresh Win 10 install, everything worked great, so I installed my drive, memory (it only came with 8GB) and GPU. When I powered it on, the power light was flashing and the diagnostic numbered LEDs were flashing 1, 3, then 2. This didn’t make much sense as it didn’t match the diagnostic chart, so I went back to the other drive and integrated GPU; everything worked again.
I put my drive back in without my GPU and Windows loaded normally, albeit with one monitor, obviously, so I shut it down and re-installed the GPU, and everything looked the way it was supposed to, both monitors.
This brings me to my new problem though; when I move the mouse, move windows around, scroll, or work in AutoCAD, movements are intermittently jerky and delayed, as is video playback, both on disk and Youtube. I updated my graphics driver, no change. Any ideas where to go from here? GPU damaged by the power outage maybe? GPUs are hard to come by right now, especially since our local Fry’s Electronics closed, so I hate to throw money at the first one I find…
BTW, I did run diagnostics on memory, HHD, GPU, etc, no problems found. Edit: I should probably note that sound is unaffected in videos, only video playback itself is affected.
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