Moved to Puerto Rico, PC shuts off after 30 seconds

JJD.Photography wrote in post #19148314
Thanks for all the feedback. I picked up a 600w APC UPS yesterday, still shut down after UPS put in place. I noticed constant red light on Motherboard next to RAM, so removed and reseated RAM and PC powered on with monitor response. CPU was at 170 degrees Fahrenheit within 3 minutes of startup while MB was at 89 degrees. All fans were on to include CPU. I cleaned the PC late 2019, no problems before or after cleaning. PC build is 8 years old now. Perhaps new grease and cleaning is needed specifically at CPU? First time ever having heat problems. Room was warmer about 82F, but don't think that should have an impact. I will make sure room is cooled with AC with future use of PC's. But, first I need to figure out why overheating. Thanks again for any I input.

You should google “Sabertooth z77 overheating” (without the quote marks) and see the number of hits where people have experienced what is often termed “ridiculous” temperatures due to failure of the sensor on the motherboard. See https://www.overclocke​rs.com …ng-ridiculous-temperature for instance.

But I would still be checking thing that might have been compromised during the shipment. You likely have no less than two fans, and perhaps as many as eight, make sure they are are operating. Verify that any heatsink is still in contact with the appropriate areas that get hot.

Over on overclock.com, some people had power/boot issues with their “builds” and it was due to the case power switch being dislodged into a physically ON position. The PC’s would boot, then go blank, then reboot, blank again, etc. Might be worth checking that switch but it seems like your power situation is resolved.

Just to satisfy the curiosity of everyone here, will this machine now boot properly without that UPS? I personally do not feel the “quality” of the power (some comments about squarish vs. sine wave) had anything to do with your issue. “Yes” there are power disruptions but I was employed as an engineer for 25 years in power generation for one of the largest companies in the world that makes power GEneration equipment and I can tell you that the power in PR is “decent”, if not substantially improved since the hurricane of 2017.

So it boiled down to needing to reseat RAM...was that true of both PCs?

Wilt wrote in post #19148445
So it boiled down to needing to reseat RAM...was that true of both PCs?

The interesting thing Wilt is that MB is notorious for having problems with poorly seated RAM sticks. The RED led, which is adjacent to the RAM mounting area of the MB is the clue. There is also a test switch adjacent to the RAM that reads MemOK? (or something similar). Sometimes after reseating the RAM sticks its a good idea to hit that switch which checks the RAM.

I was simply curious to learn that hard jolt during shipping AFFECTED TWO of your PCs and cause the same issue.

To the OP

I had a system that was acting likes yours. It would fire up and then shut down without going through all the protocols to run. I replaced the power supply and it still acted up. I took the machine in and it was a blown capacitor on the Motherboard. Now I only had the one computer and your seeing it on two identical computers so perhaps a surge blew a capacitor on them both???

It was only detected via thermal temperature gun on each component as they checked while the cover was off. Once the cover was on, it started shutting down again due to temperature. After replacement it worked great.

Maybe be something else to look into.

JJD.Photography wrote in post #19148314
Perhaps new grease and cleaning is needed specifically at CPU?

It's possible the original CPU grease dried out, and shipping/transporting has affected the bonding of the CPU to the heatsink - worth a try (at least an inexpensive fix if that's the issue)

It turns out that the CPU fan was not seated properly as 2 screws had disconnected. I discovered this as I was attempting to remove the fan to install new thermal paste. Fast forward with new paste and properly seated fan and the PC is running strong.

I will look at my wife's PC at some point in the near future. She doesn't need it at the moment as we're still settling in.

Thanks to all for the feedback.

A little off topic. Last year in Portugal my MacBook Air would vibrate. I used a plug adapter but it was not grounded properly. I purchased a proper power cable and it solved problem. Just an FYI thing.