RCA 42PA30RQ-- sound AND picture! No ability to change settings though

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • laurabrandom04
    New Member
    • Mar 2014
    • 5
    • United States
    #1

    RCA 42PA30RQ-- sound AND picture! No ability to change settings though

    Hi-- first of all, I am not electronic savy. Fixing electronics is more of a hobby-- I enjoy taking things apart, troubleshooting, putting them together again, and I find the "puzzle" to be fun. I have no education or training so I don't speak the lingo. All the same, I have failed at fixing my RCA plasma 42PA30RQ after 10 days of work.

    First of all, the television was playing a DVD on A/V input at sound volume 38 last week when I was leaving my home. I touched the side panel buttons on the side of the TV to turn off the power manually. I felt like I gave/got a big static electricity zap (we have dry Wisconsin air) and the TV surged-- it went off and came right back on. I pushed power again and it did not go off.

    I messed around with the remote and side key panel. The TV turns on and off with the remote ONLY. The TV does not respond to any functions pushed on the side key panel or any functions from the remote control.

    I opened up the television and opted to replace the two obvious culprits. There is a control board that is actually attached to the back panel of the television (a keypad panel circuit board with a cable that comes off and joins into the main control board of the TV) and there was a remote control sensor circuit board that also has a cable that comes off of it (are these what we're calling "Y cables"? and joins the main circuit board.

    That cable could best be described as a Y cable. One end comes into the main circuit board from the side key panel. One end comes in from the remote control key panel. They join together as ONE that plugs into the main circuit board for the television.

    I replaced both panels with new parts. I also broke one of the wires for that Y cable and I had to take it to a radio store for them to solder the wire I broke. They removed the broken wire pieces, re-crimped the wire in a new pin, and inserted the new pin.

    I reassembled the television and we're right where we left off. The TV turns on and off with the remote only but is non-responsive to functions on the keypad panel.

    I hate to trash a TV that doesn't seem to have a major error and I am able to continue watching DVD's on it with sound level 38. Any ideas on what step for repair I might have missed? I really hate to throw it away.

    Reminder: I don't "speak" electronic so talk to me like I am dumb because I am

    Admin: I could not find any posts on this topic so I did start a new thread. Hope that's okay.
    Tags: None
    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK
      #2
      Re: RCA 42PA30RQ-- sound AND picture! No ability to change settings though

      Odd fault.
      First have you tried taking the batteries out of the remote and trying buttons on the TV itself - just to rule out conflicting code from the remote?
      You might have to replace the main A/V board which is what the keypad should control, perhaps its EEPROM is corrupted.
      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

        Comment

        • laurabrandom04
          New Member
          • Mar 2014
          • 5
          • United States
          #3
          Re: RCA 42PA30RQ-- sound AND picture! No ability to change settings though

          The AT&T remote also turns it on and off and I did swap out the batteries on the RCA remote. I also programmed a universal remote today and the universal remote turns the tv... on and off. But none of the 3 remotes that turn it on or off respond to other functions.

            Comment

            • laurabrandom04
              New Member
              • Mar 2014
              • 5
              • United States
              #4
              Re: RCA 42PA30RQ-- sound AND picture! No ability to change settings though

              Am I allowed to post on here a link? I hope so. I'm going to try to follow the rules but so long as I am not spamming or being rude, I bet it's okay.

              http://ecx.images-amazon.com/images/...L._SL1500_.jpg

              That's a link to the board BOTH the remote circuit board and the keypad circuit board join into. In the upper left, you see a white plug. The two cables come together and join together and plug in right there.

              Would it be advised to attempt to also switch out this board?

                Comment

                • tw2005
                  Badcaps Legend
                  • Oct 2011
                  • 6458
                  • Australia
                  #5
                  Re: RCA 42PA30RQ-- sound AND picture! No ability to change settings though

                  I think that's your only option now. Since both inputs do not work and you've replaced the keypad and IR boards that leaves the mainboard.

                  Looking at the board, Looks like a couple of transistors, diode and some SMD caps. Any one of those could have been damaged by high voltage discharge or even further into the cct?

                  Mainboards seem fairly cheap, what's on the sticker on the bottom of the board?

                  Quite a few revisions listed.

                  http://www.paylesscomponents.com/cat...lt/?q=42PA30RQ

                  http://www.shopjimmy.com/catalogsear...RQ+&restrictBy[master+part+type]=Main+Board
                  Attached Files
                  Last edited by tw2005; 03-10-2014, 09:06 PM.

                    Comment

                    • laurabrandom04
                      New Member
                      • Mar 2014
                      • 5
                      • United States
                      #6
                      Re: RCA 42PA30RQ-- sound AND picture! No ability to change settings though



                      I'm not sure what the part says, as the TV was totally reassembled for me to turn it on. I was sure replacing the IR and keyboards were going to solve my troubles.

                      One of the photos is the entire back of the TV and obviously the keyboard isn't in proper location, as it belongs attached to the back panel of the television. The other one is the close up of the board where the IR and Key join up by cable.

                      I'll check around and see if I can't find a replacement if you think that could be all that's missing. I'm out of shoulder surgery and can't move the television on my own so someone has to move it for me, creating quite a hassle.
                      Attached Files

                        Comment

                        Previous template Next

                        Related Topics

                        Collapse
                        • cstout
                          DeLonghi AC Remote only accepts 3V
                          by cstout
                          Hello all, I've been looking into this portable air conditioner's remote control and can't find what could be causing the problem - or possibly this remote is just terribly designed.

                          The remote only works at exactly 3V - if I drop it any lower, using my bench power supply, to say, 2.9V then the remote will not flash the display and turn off. I don't have any AAA batteries that are exactly 1.5V each so I'm not sure if this remote is designed this way - to only use the freshest possible batteries, or if there's a failed component in the mix.

                          I can't find any schematics...
                          06-03-2024, 03:53 PM
                        • Mc_Millian
                          Toshiba 50lf711u20 fire tv remote not pairing
                          by Mc_Millian
                          Hello everyone,

                          I was wondering if anyone could help my in pairing a remote with a Toshiba fire tv?
                          The Tv model number is: 50lf711u20 Rev B.


                          I've already replaced all the the circuit boards within the tv along with the I.R. sensor receiver.

                          I've tried 3 different remotes which should be fully compatible with this TV.


                          Oddly enough. A few if the buttons on all of the remotes actually work. Even without pairing...which makes no sense.

                          The power button, along with the volume,back,select, and directional...
                          04-07-2022, 12:15 PM
                        • edugimeno
                          HiSense 55A7500F won't obbey to remote after power on
                          by edugimeno
                          Hi! I have this TV set that does the following:
                          1) I press the red power button on the remote
                          2) The TV turns on normally
                          3) After that it won't take any other command from the remote, neither power off, volume, channel, NOTHING
                          4) We need to either pull the main cable or use the built in button at the bottom to select funcion OFF

                          Then after it's off, it would again accept the TURN ON from the remote and same again

                          BUT:
                          -The remote does show the correct IR beam while observed thru a phone camera
                          -The TV works fine while using the MiRemote...
                          03-14-2023, 11:22 AM
                        • tmhobadcap
                          Pioneer VSX-522-K remote control not working???
                          by tmhobadcap
                          I have this receiver for at least 10 years. Usually, we just use the remote for turning on/off and adjusting the volume. Recently, the remote control started not able to turn the receiver on. Later, the volume also could not be adjusted by the remote control.

                          At first, I thought that it was the usual problem which can be fixed by cleaning the contacts on the switches and the pcb. I opened the remote and clean it with alcohol. The remote did work again after that. But after one day, it did not work again. I opened it again and clean with alcohol and contact cleaner. Again it worked...
                          12-24-2020, 01:44 AM
                        • rustinjust
                          Please help, where can I get a remote for my subwoofer?
                          by rustinjust
                          I’ve got a subwoofer that I’ve had for nearly 20 years, it did come with a basic remote which I’ve lost. It’s a generic make of subwoofer, I can’t see a brand sticker on it. It comes with 2 speakers.

                          Question recently I’ve connected it up to my tv which has greatly improved the sound on my tv, however I’d like to be able to mute the subwoofer when ads come on or just mute it when the phone rings etc. I tried using a cheap all in one tv remote on the subwoofer and the volume button would only work to increase volume but not turn it down or mute it

                          Is there...
                          10-28-2023, 03:43 AM
                        • Loading...
                        • No more items.
                        Working...