Moved to Puerto Rico, PC shuts off after 30 seconds

My wife and I moved to Puerto Rico from the mainland a few months ago. I just got around to setting up the PC's, which worked perfectly before the move. My wife and I both have the same exact computer build. Both PC's will start and not recognize the monitor, then shut down shortly after. I have swapped the power cords around and problem still there. I have also made sure all connections are good to motherboard, drives, RAM seated, etc...

I have been reading up on possible problems. I'm starting to think it's a power issue, but PR runs the same 120v/60hz as the US, so not sure why it would be the power. Could the fix be as easy as getting new power cords? Maybe the problem is with the PC power supply? It's definitely not overheating as the room has a nice AC system and all PC fans are on before PC shuts down.

Thank you for any advice.

Conputers if it matters:

CPU: Intel Core i7-3770K Ivy Bridge
Motherboard: Asus Sabertooth Z77
Power Supply: Seasonic M12II 620w

UPDATE: Picked up a APC UPS, still was shutting down. Noticed 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

Highly doubtful that it's a power cord issue as there is little that can go wrong. First step is listen to the post beeps. Do you hear one beep indicating all is well of multiple beeps or multiple beeps. This will narrow down the issue. Another quick fix you can try is resetting the BIOS. I doubt that it will resolve the issue but it's so easy and sometimes works. Worth a try.

I believe I was hearing 1 beep as the PC's shut off. I'll look into resetting the BIOS.

A buddy said I may need a backup battery as power may not be consistent/constant. I am researching them now.

Thank you for your feedback.

It's unlikely that the power would fail at the same point of the boot process every time. I mean, a back-up UPS is always a nice thing to have but I doubt it's going to resolve your issue.

I agree with JJ's comments. The computers possibly got jostled during the move or sustained some corrosion of contacts while sitting around. I would take them to a PR computer shop and let them get them back into shape.

JJD.Photography wrote in post #19147616
I believe I was hearing 1 beep as the PC's shut off. I'll look into resetting the BIOS.

A buddy said I may need a backup battery as power may not be consistent/constant. I am researching them now.

Thank you for your feedback.

For what it is worth, you can find the manual for the Sabertooth Z77 MB at http://cdn.billiger.co​m …4/Bedienungsanl​eitung.pdf.

Do you get any indication of life on the monitor during the 30 second phase of boot? I also see in the manual that there are some status LED’s on the MB. Have you checked them for a possible indication?

Are these PC's plugged into a power strip that could be tripping?

Archibald wrote in post #19147675
I agree with JJ's comments. The computers possibly got jostled during the move or sustained some corrosion of contacts while sitting around. I would take them to a PR computer shop and let them get them back into shape.

But OP said, "My wife and I both have the same exact computer build. Both PC's will start and not recognize the monitor, then shut down shortly after. "
The exact same issue developed on two PCs due to transit?!

Wilt wrote in post #19147698
But OP said, "My wife and I both have the same exact computer build. Both PC's will start and not recognize the monitor, then shut down shortly after. "
The exact same issue developed on two PCs due to transit?!

Transit and storage is what the computers have in common.

Sometimes the reason for something like this is something entirely different, something that the poster never shared with us.

But what possibly could have become a problem in TWO PCs while in transit?

I could understand that after transit while everything was being connected, the monitors were NOT CONNECTED, due to use of wrong cables or being both plugged into the wrong port of both computers. That is not 'transit' related, but re-installation related.

Wilt wrote in post #19147719
But what possibly could have become a problem in TWO PCs while in transit?

They could have been dropped off the dock. But that is rash speculation.

Are other things working correctly on the same circuit? Check the line voltage and verify you see 120 V. Puerto Rico got hit by a hurricane and I have the impression they are still recovering all these years later.

The links below suggest the power system is still "fragile", a word used in the second reference.
https://www.enr.com …rebuilding-pushes-forward
https://www.utilitydiv​e.com …id-but-how-can-it/585640/

Capn Jack wrote in post #19147725
Are other things working correctly on the same circuit? Check the line voltage and verify you see 120 V. Puerto Rico got hit by a hurricane and I have the impression they are still recovering all these years later.

The links below suggest the power system is still "fragile", a word used in the second reference.
https://www.enr.com …rebuilding-pushes-forward
https://www.utilitydiv​e.com …id-but-how-can-it/585640/

Same thought crossed my mind when I first read this thread yesterday. I knew about PR problems with its power utility having insufficient funds to repair hurricane damager years ago.
Multimeters are not really expensive...you can easily read the line Voltage coming out of a AC socket using an $11 meter available thru Amazon. Put meter in AC Voltage mode (not DC Voltage mode...burn out the meter!).

A power issue came to mind, that the Voltage might be right, at 110-120V, but the waveform of the power is NOT a pure Sine Wave, but closer to a Square Wave...it is know that cheap DC-to-AC convertors output a Squarish Wave rather than Sine Wave, and it causes studio flash units to fail. No way to detect this with and inexpensive multimeter...you need to view the waveform on an oscilloscope.

One quick and easy test is to take one or both computers to another location - preferably one with known "good" power - a location possibly like a major office complex or a government building - school computer lab perhaps?
It's unlikely that both were affected in exactly the same way by anything that happened during the move so power seems the likely culprit.

I’ll ask again, since similar questions went unanswered previously...

Do you get any indication of life on the monitor during the 30 second phase of boot? Status lights, power ON/OFF? If you get some form of status light on the monitor (or monitors) do they change once the boot process dies? I also see in the manual that there are some status LED’s on the MB. Have you checked them for a possible indication?

Are these PC's plugged into a power strip that could be tripping?

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.