Dead 37" RCA 37LA30RQ

[joeshannallie]

I picked up a mint 37" Rca LCD tv. It is dead with no stand by light or anything on it.Person said it came a storm and the TV went out and that was it. Well took it apart and nothing ovbious. I have attached a pic of the main board and the part circled in red gets really hot when the power cord is connected. Would this cause the dead issue? How can I test it. I do have a multi meter.

[tom66]

Re: Dead 37" RCA 37LA30RQ

It could be shorted. It looks like it is the CPU core supply, there is a chance the CPU is bad. Try measuring DC volts on each pin, red on pin/tab and black on chassis.

[joeshannallie]

Re: Dead 37" RCA 37LA30RQ

Measure volts on the board I posted, Right? I know this may have or I say was a dumb move on my part but can touch a few of the can type capacitors on top of them on the power board and I feel a slight tingle from them. Is this normal? What is the part called that you say could be shorted?

[tom66]

Re: Dead 37" RCA 37LA30RQ

Yes, on that board. You should avoid touching the power board, as electric shock could result. (Tingle is normal.) The device in question is a voltage regulator IC.

[joeshannallie]

Re: Dead 37" RCA 37LA30RQ

Thank you for the replys. It will be the weekend before I can get back to the TV. Can you lead me to where to order the part on the board that is getting hot? Is it a 3.3 regulator? That is all I am coming up with by searching EH16A, That is what is printed on it.

[tom66]

Re: Dead 37" RCA 37LA30RQ

First, need to check and see if it is bad, or if a component is causing it to appear bad. So no point ordering it until you have tested it. It is probably a 1.2V CPU regulator.

[joeshannallie]

Re: Dead 37" RCA 37LA30RQ

Tom can you tell how I would know if the CPU is dead? I will be getting back on the TV tomorrow and you mentioned the CPU.

[joeshannallie]

Re: Dead 37" RCA 37LA30RQ

Here is some voltages from the power supply. It shows 004 on my multi meter on 5v pins and shows 0 on the 24v pins. Also I made a mistake on the mainboard about what was getting hot. I have redid the pic and circled what actually is getting hot. Also the gray canister thing is also getting hot. The voltage is 002v on the legs of the black part that is getting hot.[/IMG][/IMG]

[joeshannallie]

Re: Dead 37" RCA 37LA30RQ

Here is the main board, I could not figure out to put 2 pics in one post. The parts that are circled in red get very warm. The volts on the legs 004 on the outside legs and 0 on the middle leg.[/IMG]