Rca l32hd31yx13

[dcapper]

Acquired this tv the other day. Why I took it, I have no idea. Anyways I thought it was the main board. Payless Components sent me one and I installed it but removed it right away when I realized it was modded and missing parts. I sent it back. But it did the same thing my mainboard did. I can turn the tv on and off with the remote or panel but I get no pic or no sound. I am getting proper voltage to the inverter and to the mainboard. I still think it could be the mainboard but I don't want to sink any major cash into this thing.

I just lifted the panel a little to take the pics. I can unhook it all to take better pics if needed.

[stj]

Re: Rca l32hd31yx13

a much better pic of the board would help.
i presume the backlight works.

maybe you are missing he 12v line.
the amps and panel are usualy 12v

[dcapper]

Re: Rca l32hd31yx13

I'll tear it apart tomorrow. Real dumb setup. Have to disconnect the tcon to open it up.

[stj]

Re: Rca l32hd31yx13

lol
i have a UMC (technika/tesco) pos here that has everything on the rear - other than the panel & controls.
you have to split it about 6inches,
then put your arm in and unplug the panel, the button-board and the backlights.
only then can you take the back off fully!!!

[dcapper]

Re: Rca l32hd31yx13

Here is some pics from the power supply, mainboard, and inverter. I am getting 24v at the inverter.

[stj]

Re: Rca l32hd31yx13

you need to power-up the psu& mainboard & meter the voltages on the connectors between the psu & mainboard to see if your getting 5&12v
and then look at the mainboard voltage regulators - see if they all have outputs.

[dcapper]

Re: Rca l32hd31yx13

Metered all my points. All reading voltages. I removed my inverter board and metered where it goes to the panel and there is no voltage or before the steup transformers. I have the 24v coming in but dies somewhere on the board. Getting a short across a diode but I tested it out of circuit and it's fine. Tested all the diodes and transistors so far and no fault found.

[Agent24]

Re: Rca l32hd31yx13

Getting a short across a diode but I tested it out of circuit and it's fine.

Check for something shorted in parallel?

[dcapper]

Re: Rca l32hd31yx13

I think cause there is a schottky transistor by it, it might show the short. I'll take a good pic of the area after work.