PN60F8500 - Hdmi no signal

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  • itelite
    Senior Member
    • Aug 2016
    • 124
    • USA
    #1

    PN60F8500 - Hdmi no signal

    Looking at a PN60F8500 Main board number BN94-06205B

    Only HDMI 4 works. 1 2 and 3 will detect but do not display and image. Just gets a no signal message after the time out.

    My prime suspect is the sii9687 HDMi switching chip. I went over solder joints with no change. I am inclined to just change the chip out but the only source i can find is form china with a significant lead time.

    I have searched everywhere for anyone talking about this issue, all i can really find is a few eBay listing for repair services.

    Any chance anyone has any idea what they might be doing in these repair services?

    Ive looked over the data sheet for the sii9687 and it seems dead simple. 4 inputs one output and a few DDC/EDID channels. If i am getting HDMI 4 i have to assume that everything from the output to the display is working correctly. and there is nothing of consequence (as far as i can tell) between the HDMI ports and the sii9687.

    Looking for some thoughts on this, always appreciated of course.
    Tags: None
    • R_J
      Badcaps Legend
      • Jun 2012
      • 9514
      • Canada
      #2
      Re: PN60F8500 - Hdmi no signal

      Have you tried a firmware update? Latest version seems to be (1215.2 Feb 01,2017)

        Comment

        • itelite
          Senior Member
          • Aug 2016
          • 124
          • USA
          #3
          Re: PN60F8500 - Hdmi no signal

          Originally posted by R_J
          Have you tried a firmware update? Latest version seems to be (1215.2 Feb 01,2017)

          That was a thought as well. After taking well over an hour to download the update, it turns out the tv is already on 1217 via the automatic update. Could not downgrade to 1215 of course.

          Thank you though.

            Comment

            • Andrew F. Ali
              Badcaps Legend
              • Jan 2014
              • 2450
              • Trinidad & Tobago
              #4
              Re: PN60F8500 - Hdmi no signal

              Replacing that IC is a very ticklish job. If you can handle the replacement go for it.

                Comment

                • itelite
                  Senior Member
                  • Aug 2016
                  • 124
                  • USA
                  #5
                  Re: PN60F8500 - Hdmi no signal

                  Originally posted by Andrew F. Ali
                  Replacing that IC is a very ticklish job. If you can handle the replacement go for it.
                  Not too worried about the actual replacement. Just didnt want to tell this guy he has to wait 3 weeks for a chip to get here if i was missing a known issue about this model.

                  I will follow up on this thread when the replacement is done for posterity's sake.

                    Comment

                    • Andrew F. Ali
                      Badcaps Legend
                      • Jan 2014
                      • 2450
                      • Trinidad & Tobago
                      #6
                      Re: PN60F8500 - Hdmi no signal

                      Great. Thanks.

                        Comment

                        • Davi.p
                          Hobbist
                          • Sep 2009
                          • 4263
                          • Italy - Milan
                          #7
                          Re: PN60F8500 - Hdmi no signal

                          Hi, it can be not the switching chip, you forgot to say the brand, that is Samsung i guess, the eeprom connected to those ports can be ruined, are you a professional? If you have one programmer , also a few $ one like CH341A, you can copy the content of the port 4 to the others, if it's past 2011 you have the chance that in service menu yo have an item to rewrite them taking data from firmware area. Bye.

                            Comment

                            • itelite
                              Senior Member
                              • Aug 2016
                              • 124
                              • USA
                              #8
                              Re: PN60F8500 - Hdmi no signal

                              Replacing this chip was indeed solution. I had to by a bunch of them from china. if anyone sees these thread and needs one in the US PM me. I cant imagine i am going to use all of them in daily work.

                                Comment

                                • Andrew F. Ali
                                  Badcaps Legend
                                  • Jan 2014
                                  • 2450
                                  • Trinidad & Tobago
                                  #9
                                  Re: PN60F8500 - Hdmi no signal

                                  Happy that you got your telly going again. Great job, Pardner!!!

                                    Comment

                                    • BadHerb
                                      New Member
                                      • Apr 2014
                                      • 2
                                      • United States
                                      #10
                                      Re: PN60F8500 - Hdmi no signal

                                      Hi @itelite I just started having HDMI issues and think I might need a chip.

                                        Comment

                                        • BadHerb
                                          New Member
                                          • Apr 2014
                                          • 2
                                          • United States
                                          #11
                                          Re: PN60F8500 - Hdmi no signal

                                          I registered here a while ago - I forget why. I don't think I can message yet since this is my second post.

                                            Comment

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