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July 27th, 2025 21:09
Pro Micro QCM1250, freezes while trashing wired LAN
I put this into service about six weeks ago. It's been running fine except (and this is a big 'except') about once every 3-5 days the following happens:
- The system becomes completely unresponsive. The monitor is usually (maybe always, can't remember) off, and nothing I've done helps except for a hard power cycle. I've tried CTRL-ALT-DEL, ESC, disconnecting the network cable, shutdown keypresses (though I can't see what I'm pressing since the monitor is off) -- no dice.
- The processor must be very busy because the chassis and exhaust are quite warm
- The other wired ethernet devices on my LAN lose connectivity. Sometimes rebooting the router is necessary to recover network connectivity to other devices on the LAN. The router's wifi continues to work.
This freeze can happen whether the PC is awake or whether it's in modern standby in the middle of the night.
I've tried a bunch of things (none of which has helped) including:
- Running DISM and SFC to check Windows integrity
- Updating drivers and BIOS
- Disabling wake timers
- Running hardware diagnostics (all passed)
- Swapping out my router for a different router
- Disabling some services and scheduled tasks that I didn't think were necessary
The computer is only used for perhaps 3 hours a day, but still, it seems odd that the problems usually or always occur when there's no user present. For either a hardware or software problem, one might expect failures to be much more likely to surface when the machine is busy.
Any thoughts?
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STMLADMIN
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August 16th, 2025 17:08
Thank you for posting this. We recently purchased (7) of these units and have had the same issue happen on 4 of them. This is very frustrating.
Al529
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August 20th, 2025 19:14
An update on this: The problem has mysteriously disappeared, with a brand new problem replacing it.
I had added an additional memory module to the system, and one of the many changes I'd made trying to avoid the hang/freeze was to remove the memory I'd added. So the hangs could've been related to a bad memory module (although it had passed diagnostics, for what it's worth).
But the new problem that has popped up is: every few days, the system suddenly reports that no hard drive is detected:
This is a Samsung 990 Pro, not the original SSD that came in the system. I recently read about users experiencing disappearing SSDs during large data transfers since a recent Windows update, but I don't even have that update installed yet.
As with the other problem, nobody is at the computer when the error pops up. Possibly a coincidence, since the machine is only used perhaps 3 hours a day.