Vizio P50hdm plasma TV turns on then off

[froylan_m]

I have a Vizio P50hdm plasma TV, and when I turn it on it turns off after 2 seconds. Using my multimeter, I tested the standby voltage and it read 5 volts which is shown on the board. The standby light does turn on in the front of the TV so that tells me standby voltage is fine. Then, I tested the Vs and Va voltages and they were very low. The sticker on the TV says that the Vs is 196V, and the Va is 60V. After that, I tried disconnecting the X and Y sustain boards one at a time but the TV still shuts down. I would assume that it's the power supply that's the problem. Do you think it is the power supply that needs to be replaced, or do you think it's something else? I don't see any bulged capacitors or physical damage on the boards. I also tested the fuses and replaced one that was bad, but that didn't help.

[Alastair E]

Re: Vizio P50hdm plasma TV turns on then off

Photos of the complete rear internals of the set to identify the base-chassis used are needed.

[froylan_m]

Re: Vizio P50hdm plasma TV turns on then off


Here is a picture of the internals.

[Alastair E]

Re: Vizio P50hdm plasma TV turns on then off

Base-chassis is an LG set--summit like a 50PC1DA or 50X3.

Usual issues with these are the IPM Modules on both the Y-SUS and X-SUS. These are the Hybrid modules under the large heatsinks of both boards--4 IPM's in all, Any one will cause this sort of fault.

They are a Bugger to change without damaging the PCB's if you havent the correct equipment and are expensive to buy.
New ones are Not available--Only S/H--Regardless of what the Vendors say.

Suggest you trace the fault down to which board has the dead IPM--And replace the whole board complete.