LG 50PC3D Issue

Collapse
X
Collapse
 
  • Page of 4
  • Time
  • Show
Clear All
new posts
Previous 1 2 3 4 template Next
  • notatvrepairguy
    Member
    • Apr 2014
    • 40
    • USA
    #1

    LG 50PC3D Issue

    Hello! I recently came across this TV and decided to get my hands dirty and see what it takes to fix it while learning more about plasma tv's in the process.

    So far I've learned a ton and mostly from these forums, so thanks in advance!

    It's an LG 50pc3d UD

    I have replaced the YSUS and both YDRV / Y-buffers.
    Was a bit bummed out when I replaced the buffers, there was no change at all. They were only $21 a piece so I'm not too burnt.

    Attached is where I'm currently at, and I'm pretty baffled at this point. Pink lines, split screen.
    There is audio and clearly a picture behind it. I've tested antenna and hdmi with the same results.
    Inspected all caps etc, no visible damage or issues there.
    I'm wondering if it's loose or bad connections?

    Everything else seems to be functioning but as my username states, I am not a pro in this field.

    Any ideas? I appreciate any help I can get!
    Attached Files
    Tags: None
    • martino
      Not so "senior"
      • Aug 2013
      • 997
      • canada
      #2
      Re: LG 50PC3D Issue

      I'd say logic board but let Tom66 chime in,he's the pro at plasmas.....
      Proud owner of dozens of broken TV's and many,many,many boards.


      Our website and passion:http://hollenhundshepherds.com/

        Comment

        • audiofreak19
          Badcaps Veteran
          • Apr 2013
          • 556
          • usa
          #3
          Re: LG 50PC3D Issue

          I was thinking the same thing.

            Comment

            • notatvrepairguy
              Member
              • Apr 2014
              • 40
              • USA
              #4
              Re: LG 50PC3D Issue

              Well if it's only a $30 part, I might just try that board as well. I'll see if anyone else agrees or has other ideas and order it Monday probably. THanks!

                Comment

                • notatvrepairguy
                  Member
                  • Apr 2014
                  • 40
                  • USA
                  #5
                  Re: LG 50PC3D Issue

                  Anyone else care to chip in with some advice before I order this part? I can provide more pics if necessary, thanks!

                    Comment

                    • notatvrepairguy
                      Member
                      • Apr 2014
                      • 40
                      • USA
                      #6
                      Re: LG 50PC3D Issue

                      I'm about to order this part but would really appreciate if anyone else could give their opinion on what they think needs to be replaced.

                      Found a logic board for $30 but would really like to avoid replacing unnecessary parts if possible!

                      Thanks!

                        Comment

                        • tom66
                          EVs Rule
                          • Apr 2011
                          • 32560
                          • UK
                          #7
                          Re: LG 50PC3D Issue

                          Y-sus Vsc voltage bad would be a guess; have you tried checking the Vsc and -Vy compared to panel rating? I think the control/logic is OK for now.
                          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

                            • notatvrepairguy
                              Member
                              • Apr 2014
                              • 40
                              • USA
                              #8
                              Re: LG 50PC3D Issue

                              I have not, but I just replaced the YSUS last week. I got it off ebay.

                              Could you give me any more info on how to test this?

                              Should I contact the ebay seller about a defective part?

                              Thank you for the response, I really appreciate your assistance.

                                Comment

                                • tom66
                                  EVs Rule
                                  • Apr 2011
                                  • 32560
                                  • UK
                                  #9
                                  Re: LG 50PC3D Issue

                                  Can you supply a picture of your Y-sus?
                                  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

                                    • notatvrepairguy
                                      Member
                                      • Apr 2014
                                      • 40
                                      • USA
                                      #10
                                      Re: LG 50PC3D Issue

                                      I'm at work right now, but if you need an "installed picture" I can get you one tonight.

                                      For now, I can give you the ebay pictures from the auction I purchased if it helps.

                                      http://www.ebay.com/itm/261447989535...84.m1497.l2649

                                        Comment

                                        • tom66
                                          EVs Rule
                                          • Apr 2011
                                          • 32560
                                          • UK
                                          #11
                                          Re: LG 50PC3D Issue

                                          OK in your case Vscan tested across top and middle metal plates where the buffers connect - should be around 150V.
                                          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

                                            • notatvrepairguy
                                              Member
                                              • Apr 2014
                                              • 40
                                              • USA
                                              #12
                                              Re: LG 50PC3D Issue

                                              Sorry, I'm not 100% sure what that means hahaha. Would you mind explaining a bit more?

                                                Comment

                                                • tom66
                                                  EVs Rule
                                                  • Apr 2011
                                                  • 32560
                                                  • UK
                                                  #13
                                                  Re: LG 50PC3D Issue

                                                  The metal plates sticking out of the Y-sus connecting to the buffers, do you see them?
                                                  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

                                                    • notatvrepairguy
                                                      Member
                                                      • Apr 2014
                                                      • 40
                                                      • USA
                                                      #14
                                                      Re: LG 50PC3D Issue

                                                      Yup, there are 3 of them correct?

                                                      The "top" referring to when its installed I assume?

                                                      Sorry, my electrical experience is very little. I do have a buddy who is pretty knowledgable about these things though.
                                                      If you could give me an idea of what tool I need and basic steps to test it I would appreciate it!

                                                        Comment

                                                        • tom66
                                                          EVs Rule
                                                          • Apr 2011
                                                          • 32560
                                                          • UK
                                                          #15
                                                          Re: LG 50PC3D Issue

                                                          You would need a digital multimeter; do you have one?
                                                          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

                                                            • notatvrepairguy
                                                              Member
                                                              • Apr 2014
                                                              • 40
                                                              • USA
                                                              #16
                                                              Re: LG 50PC3D Issue

                                                              I have access to one, yes.

                                                                Comment

                                                                • tom66
                                                                  EVs Rule
                                                                  • Apr 2011
                                                                  • 32560
                                                                  • UK
                                                                  #17
                                                                  Re: LG 50PC3D Issue

                                                                  OK, when you can, can you send a picture of it so we know what you have and how to work with it.
                                                                  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

                                                                    • freakaftr8
                                                                      Badcaps Legend
                                                                      • Oct 2012
                                                                      • 3743
                                                                      • USA
                                                                      #18
                                                                      Re: LG 50PC3D Issue

                                                                      What's your -vy voltage doing. Fluctuating perhaps?
                                                                      Did I leave the soldering iron on?

                                                                        Comment

                                                                        • notatvrepairguy
                                                                          Member
                                                                          • Apr 2014
                                                                          • 40
                                                                          • USA
                                                                          #19
                                                                          Re: LG 50PC3D Issue

                                                                          I was going to borrow one from my parents, but I haven't gotten them to confirm that they still have it.

                                                                          If they don't have it, I was going to purchase this :
                                                                          http://www.homedepot.com/p/Klein-Too...1000/202521270

                                                                          Will that work? Need something better?

                                                                            Comment

                                                                            • notatvrepairguy
                                                                              Member
                                                                              • Apr 2014
                                                                              • 40
                                                                              • USA
                                                                              #20
                                                                              Re: LG 50PC3D Issue

                                                                              Found a cheaper one that I can pick on my way home tonight.

                                                                              Will this work?

                                                                              http://www.radioshack.com/product/in...ductId=4214667

                                                                                Comment

                                                                                Previous 1 2 3 4 template Next

                                                                                Related Topics

                                                                                Collapse
                                                                                • rounin
                                                                                  MacBook Air A2337 (820-02016) USB-C Port Issue – Only Works in One Orientation (CC Line Problem?)
                                                                                  by rounin
                                                                                  Hi everyone,

                                                                                  I'm working on a MacBook Air 2020 (A2337, board 820-02016) and running into a strange USB-C issue. I've gone through quite a bit of testing and part replacement, but I'm stuck — hoping someone here can shed some light.

                                                                                  🛠 Original Issue
                                                                                  The machine initially wouldn't negotiate 20V over USB-C — stuck at 5V.
                                                                                  Diagnosis showed PP1V5_UPC0_LDO_CORE shorted to ground.

                                                                                  I replaced U3100 (UF400) using a donor board (A2179), and the machine powers on fine now.

                                                                                  ⚠️ New Problem: One USB-C Port Only Works in One Orientation...
                                                                                  04-19-2025, 01:18 AM
                                                                                • ugamazing
                                                                                  Three 820-01700 32GB Logic Boards Same Issue: Won't Wake From Hibernate
                                                                                  by ugamazing
                                                                                  I have three identical-spec 820-01700 boards (2.6/32/512), and ALL THREE boards came to us with the same fault, from different sources: The boards don't wake from hibernation with the keyboard or lid, they ONLY wake when you press the power button. I understand this is a very minor issue, but the boards must be fixed!

                                                                                  We will of course begin with the obvious (checking lid signals), but I couldn't help but notice these three boards were all 32GB variants. Has anyone noticed an issue relating to these 32GB boards in particular? I of course don't think it's a RAM issue, but it's bizarre...
                                                                                  12-17-2024, 07:05 PM
                                                                                • elmark
                                                                                  HP 15-cw1002ua strange keyboard issue
                                                                                  by elmark
                                                                                  HP Pavilion 15-CW1002UA
                                                                                  S/N 5CD0251CBC
                                                                                  P/N 7KE54EA

                                                                                  Hello guys!
                                                                                  I have a strange issue with my laptop keyboard and I'm lost trying to detect what's wrong - the KB9028Q-C or the keyboard itself.
                                                                                  It powers on OK and has no other issues except the following:
                                                                                  • CAPS LOCK does not work at all
                                                                                  • Fn button toggles Flight Mode
                                                                                  • When I press 't' or '5', it produces 't5', and when I press 'y' or '6', it produces 'y6'
                                                                                  • (with SHIFT pressed: 't%' and 'y^' respectively)
                                                                                  I initially thought it was a keyboard malfunction (internal short, etc.),
                                                                                  but when I press and hold...
                                                                                  06-27-2025, 01:10 AM
                                                                                • Simone Vergani
                                                                                  Alienware 15 R2 Service Tag: DL7NN32 ISSUE (Battery is not charging)
                                                                                  by Simone Vergani
                                                                                  Hello everyone,

                                                                                  I'm experiencing an issue with my Alienware 15 R2 (Service Tag: DL7NN32). The laptop works perfectly when connected to the AC adapter — it powers on and functions normally. However, the battery does not charge. If I disconnect the DC adapter, the laptop shuts down immediately, as the battery is at 0%. I have replaced the battery with a new compatible one, but the issue persists. I also replaced the AC adapter with a compatible one, but the battery still doesn't charge.

                                                                                  To assist with troubleshooting, I'm attaching two power circuit schematics:
                                                                                  • Power
                                                                                  ...
                                                                                  03-05-2025, 02:25 PM
                                                                                • wizard13
                                                                                  Dynabook Satellite Pro C50D-B-100 - BIOS Issue, Black Screen
                                                                                  by wizard13
                                                                                  Hello everyone,

                                                                                  I am experiencing a BIOS-related issue with my Dynabook Satellite Pro C50D-B-100. When I power on the laptop, the screen stays black, and there is no response from the system. I suspect a corrupted BIOS.

                                                                                  I have checked the forum and the available documentation but could not find a solution specific to my issue.
                                                                                  • Brand & Model: Dynabook Satellite Pro C50D-B-100
                                                                                  • Part Number (P/N): PYU13E-00C00PFR
                                                                                  • Serial Number (S/N): 22028896H
                                                                                  • System Configuration (SC): A1PYU13E1127
                                                                                  • Motherboard Model: IP3_ACN16_MB_V21_20211222A
                                                                                  • Power Input: DC 19V –
                                                                                  ...
                                                                                  02-28-2025, 02:43 AM
                                                                                • Loading...
                                                                                • No more items.
                                                                                Working...