Re: 42" rca 42pa30rq no picture but sounds working

Thanks for your help tom,
I got the y-main board in tonight, and that was the problem. My thinking on it is the y buffer board cap that was burnt, shorted out and took out something on the main board. what do you think? i had to reseat some connections to the ribbon cable on the buffer board because when the screen first came up had some black bars in line with the connections, was able to get that out and picture looks great now.
Might would like to look into it more and find the bad coponent on that board at...

Re: 42" rca 42pa30rq no picture but sounds working

Tom,
i upluged the y-main power plug and checked the voltages, The excess clicking from the relay stops when unplug it by the way ,sonds like normal operation, When i cut the switch on, Vs voltage goes to a steady 207vdc and Va goes to 54vdc also steady, but after about 5 seconds the voltage starts to drop out or dissapate slowly to 0, this maybe be normal because where it doesnt see the y-main board? not sure.

Re: 42" rca 42pa30rq no picture but sounds working

i wouldnt mind finding the bad component in case it does it again, but i will probably order a Y MAIN and try that to get it going, there is no physical damamge on the y board. i dont have a scope although i have access to some at work, getting to use them is another matter all together.

Do you think there is any need to get a power supply board when i order the y board?

Thanks

Re: 42" rca 42pa30rq no picture but sounds working

i replaced the y-buffer board (along with the logic board & the x-main sus board, got them for a good price)
still has the same problem black (dead) screen no picture, but sounds still working.

What im noticing is i cant read any voltages when i first power the tv and when i hit the power button, it the relays on the power supply board will click a couple times normally it was one click when tv was working. It does go to 15 volts dc but once the clicking stops it steadily goes down to 0. no other...

Re: 42" rca 42pa30rq no picture but sounds working

I was thinking about replacing the buffer board and the y main board but ill try the buffer board first, I believe i can get it for about 15 bucks, shouldnt be too bad
Thanks Tom

Re: 42" rca 42pa30rq no picture but sounds working

it wasnt a dead short but did read about 10 ohms,

Re: 42" rca 42pa30rq no picture but sounds working

here is a pic of the component, it was under some silicon so i noticed the black spot and cut away the silicon to inpect it. its on the y buffer board.

thanks...

Hello everybody.
Got a problem with my rca plasma. came in the room with the tv on and found the picture was dead on the tv. sound was still working. with some help(service manuals) from Tom66 . thought i would try and fix it myself.
First off, when you plug the power into the tv, when it was working and i hit the power swich and you would hear one click from the power relay and the picture would come up. Now when i turn the power on, its one click, the several clicks on & off.
I checked for operating voltages at connector(cn804, to the y-main board) but no voltage present...