Akai pdp5073tmc plasma no hdmi

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  • braxton
    Senior Member
    • Nov 2009
    • 146
    #1

    Akai pdp5073tmc plasma no hdmi

    I picked up a 50" Akai plasma from 2006. It works well and has a nice picture. Component inputs work as expected but when I plug an HDMI cable into the TV it registers as "no input". I've tried a few different sources (blu ray and cable box) and a few cables. Tried 720p, 1080i etc- nothing. Not a "mode not supported" but "no input" - like it is not even registering a signal.

    Any suggestions?
    I've attached a couple pics of the main board where the hdmi input is.
    Attached Files
    Tags: None
    • braxton
      Senior Member
      • Nov 2009
      • 146
      #2
      Re: Akai pdp5073tmc plasma no hdmi

      I'm tempted to remove this board and reflow in an oven, but it has quite a few electrolytic caps (unlike most main boards).

      Can these cylindrical electrolytic caps tolerate a reflow at 380F for 10 minutes?

        Comment

        • ReeceyBurger123
          Never Give Up !
          • May 2014
          • 7325
          • Britain
          #3
          Re: Akai pdp5073tmc plasma no hdmi

          No no no ! These boards are prone to blowing the caps will link my video on the same board.
          Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

          https://www.facebook.com/Telford-Tel...7894576335359/

            Comment

            • ReeceyBurger123
              Never Give Up !
              • May 2014
              • 7325
              • Britain
              #4
              Re: Akai pdp5073tmc plasma no hdmi

              Check this out almost every cap on them boards blow up:

              https://m.youtube.com/watch?v=WojR82ocSck
              Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

              https://www.facebook.com/Telford-Tel...7894576335359/

                Comment

                • ReeceyBurger123
                  Never Give Up !
                  • May 2014
                  • 7325
                  • Britain
                  #5
                  Re: Akai pdp5073tmc plasma no hdmi

                  In fact I can already see some blown up ones on your board bet thats possibly the issue.
                  Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

                  https://www.facebook.com/Telford-Tel...7894576335359/

                    Comment

                    • braxton
                      Senior Member
                      • Nov 2009
                      • 146
                      #6
                      Re: Akai pdp5073tmc plasma no hdmi

                      Thanks for the info. I didn't see any obvious bulging caps when I first looked at the board but I might have another closer look...

                        Comment

                        • ReeceyBurger123
                          Never Give Up !
                          • May 2014
                          • 7325
                          • Britain
                          #7
                          Re: Akai pdp5073tmc plasma no hdmi

                          Its the little ones, I measured some with my esr tester even ones that looked ok but had esr of 40ohms aka open circuit so be careful. You have an esr meter ?
                          Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

                          https://www.facebook.com/Telford-Tel...7894576335359/

                            Comment

                            • braxton
                              Senior Member
                              • Nov 2009
                              • 146
                              #8
                              Re: Akai pdp5073tmc plasma no hdmi

                              Originally posted by ReeceyBurger123
                              Its the little ones, I measured some with my esr tester even ones that looked ok but had esr of 40ohms aka open circuit so be careful. You have an esr meter ?
                              Thanks again for the help! No I don't have an esr meter, just a digital multimeter. I replaced 5 X 200uf 16v caps that were slightly bulging with 200uF 25v caps, but that made no difference. There are so many electrolytic caps on this board that I don't think it is worth it to go any further. I don't feel like replacing 20+ caps just to (maybe) get HDMI back. Component still works fine I guess.

                                Comment

                                • Moreno83
                                  Badcaps Legend
                                  • Jun 2014
                                  • 2008
                                  • The Netherlands
                                  #9
                                  Re: Akai pdp5073tmc plasma no hdmi

                                  The tv will give issues in the future if you dont replace the caps. The little ones that normally dont bulge are already bulging. So if you want a tv for a few weeks then dont bother , if you want it to play a good picture for a longer period of time then replace the caps.
                                  I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!

                                    Comment

                                    • Alastair E
                                      Chief Womble
                                      • Mar 2013
                                      • 1963
                                      • U.K.
                                      #10
                                      Re: Akai pdp5073tmc plasma no hdmi

                                      HDMI issue is prob the controller chip--in addition to the cap issue....
                                      TELEFIX

                                      How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
                                      http://www.irf.com/technical-info/appnotes/an-1088.pdf
                                      PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

                                        Comment

                                        • braxton
                                          Senior Member
                                          • Nov 2009
                                          • 146
                                          #11
                                          Re: Akai pdp5073tmc plasma no hdmi

                                          Thanks everyone for the input.

                                          There are at least 100 caps on this board so replacing most/all of them would be quite an undertaking to say the least. Unless someone can pinpoint the ones I should be focusing on.

                                          And I'm also wondering if the HDMI controller chip might be bad as mentioned above. Probably not much I could do if that was the case.

                                            Comment

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