Samsung UN60FH6200F TV - No backlight - Please help

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  • Snipeye
    New Member
    • Jul 2018
    • 9
    • USA
    #21
    Re: Samsung UN60FH6200F TV - No backlight - Please help

    Good news - I figured it out! There were three resistors blown on the back side of the board, near where the LEDs plug in. They were, from the shopjimmy picture, supposed to be 3R00 resistors, in parallel, and I'm guessing they were just acting as a fuse. I measured one at 16Mohm after desoldering it, and guessing that that was the problem, shoved a beefy 1.5ohm resistor in their place. Worked like a charm.

    (Note that I will not mention the brief moment there was a 47 ohm resistor there to see if it worked... and the blue smoke it released).

      Comment

      • Snipeye
        New Member
        • Jul 2018
        • 9
        • USA
        #22
        Re: Samsung UN60FH6200F TV - No backlight - Please help

        @budm, I was getting ~400v IIRC.

          Comment

          • Dannyx
            CertifiedAxhole
            • Aug 2016
            • 3912
            • Romania
            #23
            Re: Samsung UN60FH6200F TV - No backlight - Please help

            Those are current sense resistors if I'm not mistaken, by your description. They're paralleled to drop the resistance quite low so they don't have too much voltage drop across them. I've never seen a TV where those resistors were faulty, but I guess there's a first time for everything...
            Wattevah...

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA
                #24
                Re: Samsung UN60FH6200F TV - No backlight - Please help

                Originally posted by Snipeye
                @budm, I was getting ~400v IIRC.
                Since the current sensing resistors went open circuit, that is why you are getting 400V.
                Never stop learning
                Basic LCD TV and Monitor troubleshooting guides.
                http://www.badcaps.net/forum/showthr...956#post305956

                Voltage Regulator (LDO) testing:
                http://www.badcaps.net/forum/showthr...999#post300999

                Inverter testing using old CFL:
                http://www.badcaps.net/forum/showthr...er+testing+cfl

                Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                http://s807.photobucket.com/user/budm/library/

                TV Factory reset codes listing:
                http://www.badcaps.net/forum/showthread.php?t=24809

                  Comment

                  • emmy1
                    New Member
                    • Jun 2019
                    • 1
                    • Rwanda
                    #25
                    Re: Samsung UN60FH6200F TV - No backlight - Please help

                    what are the values of the 3 resistors on the back near the connector that are in parallel (R9151-R9153) mine are burned

                      Comment

                      • R_J
                        Badcaps Legend
                        • Jun 2012
                        • 9544
                        • Canada
                        #26
                        Re: Samsung UN60FH6200F TV - No backlight - Please help

                        All 3 are marked as 3R00 which are 3Ω each

                          Comment

                          • jasonkhonlaw
                            New Member
                            • Feb 2022
                            • 1
                            • United States
                            #27
                            Re: Samsung UN60FH6200F TV - No backlight - Please help

                            Originally posted by Snipeye
                            @budm, I was getting ~400v IIRC.
                            I know this is SUPER old, but can you tell me what power rating the 1.5ohm resistor you used had on it? My power board has the same exact issue. Thanks!

                              Comment

                              • Dannyx
                                CertifiedAxhole
                                • Aug 2016
                                • 3912
                                • Romania
                                #28
                                Re: Samsung UN60FH6200F TV - No backlight - Please help

                                Originally posted by jasonkhonlaw
                                I know this is SUPER old, but can you tell me what power rating the 1.5ohm resistor you used had on it? My power board has the same exact issue. Thanks!
                                Power can be determined by their size, though it never hurts to go bigger if unsure.
                                Wattevah...

                                  Comment

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