Random reboots on Aspire TC-865-NESelecti5, could the power supply be the cause?

snoogins34
snoogins34 Member Posts: 1 Newbie

Sorry up front for the long post!


A friend of mine was in the market for a new PC back in 2018 - something not too expensive and good for basic internet browsing, email, and MS Office productivity work for his small business. I ended up recommending the Aspire TC-865-NESelecti5 at the time (Core i5-8400, 8GB, on-board graphics). We had it shipped to me initially to do the OOTB setup, basic installs, etc.


At the time, it had some issues with crashing/rebooting if left idle, and I saw some others having the same issue where they worked around it by turning off hibernation in the power profile, so I did the same and it seemed to do the trick. I delivered it to him, set it up, and thought we were good to go.


About a year ago, he told me that they've been having problems with it rebooting on its own while they are in the middle of working - sometimes multiple times a day. Not crashing - no BSOD's or anything like that - just rebooting. I tried troubleshooting it remotely, but that was difficult so a few weeks ago I picked it up from him and set it up at my place. I grabbed their 27" monitor as well to help duplicate their setup.


When I tried to recreate it, I was only able to get it to happen once over the course of a week. I tried "stressing" the machine by playing multiple videos at once while copying files off USB and optical discs at the same time - it had no issue, other than that one isolated incident. I had it set up on my dining room table, so it was out in the open and well ventilated. I had my friend send me pics of where the machine was kept at their place, and I could see that ventilation might be an issue. So, my next test was to move it into my office under my desk where my other towers are. It's a little warmer there with all the equipment, and I placed it so there was about 2" of clearance on the left side where the side venting is on the chassis. Not terrible, but intentionally not great either.


Now, I can replicate the issue fairly easily with about 10-15 minutes of use. I've noticed things like hovering over YouTube videos to get the video preview to play is especially effective in getting it to reboot. There is nothing in the Event Viewer other than the Kernel and EventLog entries that happen when a machine reboots unexpectedly - no indication that anything is throwing a fault. If I leave the machine idle, it doesn't happen at all - I left it untouched for the last 5-6 days prior to testing again today, and it never rebooted during that time. Even when it happens, there's no obvious signs of overheating - the chassis isn't warm, the internal fan isn't kicking into another gear, etc.


Since it seems like the machine is just power-cycling, my thoughts turn to the power supply. I had a power supply tester, so I hooked it up to the Acer PSU and everything looked OK as I expected. I bought an after-market 480W replacement one from KDM on eBay, but I didn't want to replace it unless I thought it was really the problem since it's not my machine.
Based on my description of the problem, what do you all think? I know stock PSU's on lower-end PC's can be underpowered at times. I've replaced a few PSU's in my time, but I'm not some master hardware guy either, so looking for some other opinions.


Thank you!