Robertl594 Loc: Bloomfield Hills, Michigan and Nantucket

I am absolutely stumped. I have fried two monitors this week. Very strange behavior. I plug them in, the power goes on and they work for a while. Then after a while, they turn off, no way to turn them back on. I have done a hard reset on the LG 34UC97, totally fried. Spoke with LG, and they want it back for repair. Power brick appears to work on other devices, so I don't think it's that. My other Samsung 25UM57 monitor will also shut down, no way to power it up. I disconnect it from the power supply, leave it for a few hours, then it will come back on and stays on for a while, then shuts down. No issues with my computers. They power on and stay on. They are not set to hibernate. My new computer has a Geforce RTX 3060 Ti card, and the other is a Samsung laptop. Same behavior from both computers. I am only using one monitor, not two. Tried both Display Port and HDMI, same behavior.

Bought a new one as it costs less than repair and is a newer better one, but am afraid to plug it in when it arrives.

If you have any ideas as to why this could be happening, I would be very interested. I am wondering if there is some kind of circuit protection in the monitors, or if I have some weird electrical issues, however, nothing else is being affected.

Definitely driving me crazy, have spent a few days on this now, instead of getting my work done.
Thanks all.
RL

Weird wiring in my house, circuit protection in the monitors?

Najataagihe

That sounds like power spike damage.

Any storms, recently?

Are they on a UPS?


What is happening is: the chips are getting hot and quitting until they can cool down.

TriX Loc: Raleigh, NC

When you say you disconnect from the power supply, do you mean they’re plugged into a UPS? When you say weird wiring in your house, what does that mean?

Longshadow Loc: Audubon, PA, United States

"Bought a new one..."
Same model or different.

If not plugged into a UPS, can you check to see that you only have 120v to the outlet?

Longshadow Loc: Audubon, PA, United States

I believe hes asking if someone thinks he has weird wiring in his house.

Robertl594 Loc: Bloomfield Hills, Michigan and Nantucket

Thanks all. Here are the answers to all questions so far.
1. Plugged into a power strip. Then I unplug it completely from power.
2. Not sure that it is weird wiring in the house, just trying to think of the reasons why.
3. Bought a different monitor.

Chip heat sounds logical, however, why now? I have had these for years. 2016 and 2017. Very light use as they are in a second home that I am in only about 2 months a year. And why do my TV's and other sensitive devices are not affected?

robertjerl Loc: Corona, California

Few monitors have a cooling fan, they depend on room air circulation in and out of their cooling vents.
Do you have it mounted where it can get lots of air all around? I stopped using my "computer desk" because the cubby holes for the monitor and computer trapped hot air and caused overheating. Or where the hot air coming out of the desktop or anything else is blowing right on the monitor's cooling vents?

Our special needs son's gamer (train simulator programs that cause the machine to run hot from the heavy resource usage) has a fan set up to blow on him and the computer because his desk is in the far corner of the add-on to the kitchen dining area built after the central heat/AC was installed so it is 15 feet from the nearest AC vent. The little temp app I have on his machine goes from the orange or red indicator down to yellow or green when that fan is on. Good thing he likes the feel of air from a fan and is really good about keeping it running even if it interferes with the sounds and music of his simulator and other games.

Architect1776 Loc: In my mind

If all else is OK it is not the house wiring.
That is pretty straight forward.
But your situation is beyond me as far as electronics.

Robertl594 Loc: Bloomfield Hills, Michigan and Nantucket

They are LCD monitors and do not get hot, at least to my sense. They are in open space with plenty of airflow around them.

Robertl594 Loc: Bloomfield Hills, Michigan and Nantucket

I am stumped as well.

robertjerl Loc: Corona, California

By "power brick" do you mean a multi-outlet surge suppressor or are you trying to run everything off the same power converter/adapter? If that is what you are doing the monitors may be getting too much power. They generally come with their own converter/adapter power cord because they don't use as much power as a computer, desktop, or laptop they use more power than a monitor.
I use a 10 outlet commercial grade surge suppressor and every component is using its own power cord and converter. All have at least one to three inches of clearance on all sides and nothing over head for air circulation. And a ceiling fan I usually have going on low or medium speed when it gets hot.

BebuLamar

One of the monitor acted up I can just blame that it just died early but 2 of them with the same symtom it's kind of strange but I can't think of the reason. I believe these monitors are rated up to 250V or so so I doubt the voltage in the house would cause the problem.

Robertl594 Loc: Bloomfield Hills, Michigan and Nantucket

By brick, I mean the power adapter that comes with the monitors. I plug both monitor and computer ONLY into the power strip.

BebuLamar

Also you your monitors use the power adapter, a power surge is unlikely able to go pass it. I guess just send the LG back for repair if it's still under warranty.

Robertl594 Loc: Bloomfield Hills, Michigan and Nantucket

No warranty, $400 to repair it and I have to ship it. A new one with better size and specs was $350 and new.