My LG LP0910wnry1 runs when I’m fan Mode but when I turn it to cool it almost immediately shuts down flashing all lights all the way across the board

freon checked --compressor tested [possible overheating] -

The ballast might have gone bad, you'll need to check the output voltage of it. In some projectors, the power supply/ballast are combined as one PCB instead of 2 separate boards.

Hi Marie, does the green indicator light on the front panel flash after it shuts down? If it does...count how many times it flashes this will refer to a fault code diagnostic.

Keith.

Fan will run for a certain period of time after shutting down motor of vehicle. This is normal. Your engine is still hot when you turn the key off. There are sensors that tell the computer when the engine is cool enough for the fans to shut off.

Hello.
This is a thermo-related issue. It happens when some parts in your TV reach certain temperature and fail creating short so TV shuts down and goes into protection mode.
In your TV the only thing that you can do is to replace Power Supply and hope it would help. Main board generally has nothing to do with temperature. Another probability - LCD panel itself (more likely back light inverter boards that are part of the panel, you can't order them separately).
There is inexpensive way to determine if it is power supply or not. You have to purchase fast-cooling spray that technicians use for diagnostic purposes (you can buy one in electronics components store).
You have remove TV rear cover so you have access to power supply board (the one where power cord goes). Turn on TV and let it run and eventually shut down. After that unplug it from wall outlet and use spray to cool down power supply board. Make sure you don't spray too much or you cooling anything else besides that board!. Let residue evaporate and plug TV back and try to turn it on. If it act OK and stays on for long time again - replace power supply and you should be OK.
Otherwise it is time for new TV. Panel is too expensive to replace.
Regards.
Russ.

The fan you hear is probably the magnetron cooling fan and that, and the light, are probably both controlled by the electronics board that controls everything else. You might inquire online at Maytag or the Sears parts department to determine the cost of a replacement board but I suspect it will either not be available at all or cost 3/4 of a new microwave.

if it goes through shut down mode (lamp first and fans run a while), reset the settings to factory default. while you're in the menu, check the lamp hours (under settings). if they're close to 2000 hours, replace the lamp. if the projector shuts down immediately, fans and all, you have a power supply problem. you'll need to replace it.

I believe the problem in lies in the dual stage heat mode setup on the thermostat, but the unit going into defrost does make the unit act kinda strange. Even more so than other types of equipment. I would suggest hiring a licensed HVAC service technician if the problem cannot be resolved by yourself.

There appears to be a short in the unit. Not sure where. The power to the fan is not interrupted completly when the fan shuts down, still feeding voltage to the fan, keeping it running slow. Before checking the wiring, please turn off power first.

Sounds like a power supply problem. There is enough power to run the fan but when you turn it to cool the current draw by the compressor drops the voltage. The lower power light is telling you the answer to your problem.