Sanyo DP42740 Short on Main Board?

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  • vinceroger69
    Badcaps Legend
    • Mar 2012
    • 6714
    • uk
    #21
    Re: Sanyo DP42740 Short on Main Board?

    seems odd it powered up yesterday but not today do these sets suffer eeprom issues? would this cause your fault?

      Comment

      • dick_barton
        Badcaps Legend
        • Aug 2015
        • 6642
        • Wales
        #22
        Re: Sanyo DP42740 Short on Main Board?

        Need to take a step back.
        Describe exactly what the symptoms are now at this time.
        Eg. Switch on, backlights / no backlights, picture / no picture etc
        Willing to help but I'm no expert.

          Comment

          • caphair
            Badcaps Legend
            • Nov 2011
            • 1249
            #23
            Re: Sanyo DP42740 Short on Main Board?

            I'm not sure. If the original eeprom was bad and the replacement board wasn't shouldn't it have worked?

              Comment

              • caphair
                Badcaps Legend
                • Nov 2011
                • 1249
                #24
                Re: Sanyo DP42740 Short on Main Board?

                Originally posted by dick_barton
                Need to take a step back.
                Describe exactly what the symptoms are now at this time.
                Eg. Switch on, backlights / no backlights, picture / no picture etc
                Turn on, relay clicks twice power led on then 3 seconds later no power led and turns off. Let's you try 3 times before locking you out until you unplug from mains

                  Comment

                  • vinceroger69
                    Badcaps Legend
                    • Mar 2012
                    • 6714
                    • uk
                    #25
                    Re: Sanyo DP42740 Short on Main Board?

                    do what dick barton says in post 22 first but maybe if eeproms are troublesome on these sets your replacement could be faulty too i guess if board was untested ive no idea my self just a thought i had.

                      Comment

                      • dick_barton
                        Badcaps Legend
                        • Aug 2015
                        • 6642
                        • Wales
                        #26
                        Re: Sanyo DP42740 Short on Main Board?

                        Disconnect the power supply from all the other boards and jumper PS_ON to 5V Standby using a 1K resistor and check what supplies come up.
                        Last edited by dick_barton; 07-19-2016, 12:55 PM.
                        Willing to help but I'm no expert.

                          Comment

                          • caphair
                            Badcaps Legend
                            • Nov 2011
                            • 1249
                            #27
                            Re: Sanyo DP42740 Short on Main Board?

                            Originally posted by dick_barton
                            Disconnect the power supply from all the other boards and jumper PS_ON to 5V Standby using a 1K resistor and check what supplies come up.
                            Tried that I get all supply voltages

                              Comment

                              • vinceroger69
                                Badcaps Legend
                                • Mar 2012
                                • 6714
                                • uk
                                #28
                                Re: Sanyo DP42740 Short on Main Board?

                                sorry just realised this is a plasma so doubt if its eeprom related did you read this thread not sure if its the same issues your having
                                https://www.badcaps.net/forum/showth...=Sanyo+DP42740

                                  Comment

                                  • caphair
                                    Badcaps Legend
                                    • Nov 2011
                                    • 1249
                                    #29
                                    Re: Sanyo DP42740 Short on Main Board?

                                    Originally posted by vinceroger69
                                    sorry just realised this is a plasma so doubt if its eeprom related did you read this thread not sure if its the same issues your having
                                    https://www.badcaps.net/forum/showth...=Sanyo+DP42740
                                    That's interesting poster had same tv and same symptom but ended up being the SN board that fixed it. How's that make any sense? Lol

                                    Wonder how I could troubleshoot the SN board for this symptom. Nothing seems shorted on it

                                      Comment

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