RCA 42PA30RQ plasma tv problem

[Jimmy60]

Re: RCA 42PA30RQ plasma tv problem

OK, I am hoping to get a little help now. I replaced the control board making sure not to break anything else! Now I still have no picture, black screen, audio is fine!!! I do believe with the old control board I was seeing a few flashes of light across the screen on power up but now with the replacement board, I don't even get that. My first thought is maybe I got a bad control board?
Any suggestions on how to narrow this down would be appreciated.

[Jimmy60]

Re: RCA 42PA30RQ plasma tv problem

I had the exact symptoms described in this thread. Have found the top ribbon on the control board not connected properly and I broke the clasp on the control board before I could get it connected and tested. Replacement control board on the way. I will keep you posted!

[thorvauld]

Re: RCA 42PA30RQ plasma tv problem

I have the same tv also,and guess what all the same problems.Went thru numerous parts X,Y mains buffers Power supply.So what i did was went back to basics.The RJH and RJP's 30E2's I ordered from china,A long wait but way cool,Also from shanghai PN096S3 128pin square chipthese repaired my x,y mains and my Y buffer.My paticular circumstance was with the Y buffer intermitantly grounding,it would fry the RJH's on the X main then cycle power on its own and damge the Y Main.Long storey short many of the used parts i purchased online From quote broken screens were bad.Its funny people break these sets usually with no power,But curiosity gets to them so they plug it in.Thus more bad boards.Hey Tom You are one very interesting person,I really enjoy this site and its people,Thank you for letting me be about.

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

I've never seen anything like this. 2 Months out of warranty the TV just goes black in the middle of watching it.

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

Figures, when something breaks on me it's never an easy fix.

[newtothis]

Re: RCA 42PA30RQ plasma tv problem

I have taken you as far as I can, Generally speaking if test patterns were to show it would indicate a main board fault... but as you do not get the patterns regardless of the main being plugged in or not i am not sure where to look.

I only have very basic understanding of PDP's at the moment, LCD and LED on the other hand I could of helped with

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

So is this a logic board problem?
Something I failed to mention was there is a brief static session (maybe 2 seconds) every time I turn the TV on.

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

Nothing popped up on the screen..

[newtothis]

Re: RCA 42PA30RQ plasma tv problem

Yes

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

AH, okay. One last question before I do this, I leave it connected to the control board just disconnecting it on the side where the A/V inputs are correct?

[newtothis]

Re: RCA 42PA30RQ plasma tv problem

Connect everything but the LVDS cable, You should see a series of test patterns on screen.

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

Got it. What is supposed to happen when I turn the TV on? Also do I reconnect the Y and X boards before I turn the TV on or leave them disconnected?

[newtothis]

Re: RCA 42PA30RQ plasma tv problem

Highlighted

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

I figured it out, there was little holes over the numbers but I could make 1 and 2 out for sure. Which cable is the LVDS?

[newtothis]

Re: RCA 42PA30RQ plasma tv problem

Can you take a close up pic of the 4 pin connector?

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

Okay, I've located the 4 pin. The only problem so far is they aren't numbered. I'm assuming the pins are from left to right 1/2 then 3/4 on the bottom?

[capkid]

Re: RCA 42PA30RQ plasma tv problem

Something else to try: https://www.badcaps.net/forum/showthread.php?t=26790

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

As far as testing the diodes and transistors yes. I just triple checked. I don't seem to have a short in the X or Y boards.

[capkid]

Re: RCA 42PA30RQ plasma tv problem

Did you follow the steps in the thread I posted?

[Maushinator]

Re: RCA 42PA30RQ plasma tv problem

as far as "low" resisatnce goes Q5013 only reads 5.76 whereas the other 3 prongs with offset center prongs read a flat 10. I don't know if that makes a difference or not.