Need help with Samsung LN40E550f7f

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  • nomoresonys
    Badcaps Legend
    • Jan 2013
    • 12075
    • U.S.
    #41
    Re: Need help with Samsung LN40E550f7f

    So after you do the jumper procedure check for your blu-on voltage, if it is still missing, the problem is on the power supply board.

      Comment

      • Kindred1
        Senior Member
        • Feb 2018
        • 55
        • USA
        #42
        Re: Need help with Samsung LN40E550f7f

        Originally posted by nomoresonys
        https://www.youtube.com/watch?v=n54IurMvr6o here's a video explaining the jumper procedure.
        ok, so do I jump BLU_ON with b5v and ps_on with A5v?

          Comment

          • nomoresonys
            Badcaps Legend
            • Jan 2013
            • 12075
            • U.S.
            #43
            Re: Need help with Samsung LN40E550f7f

            Originally posted by Kindred1
            ok, so do I jump BLU_ON with b5v and ps_on with A5v?
            Connector off mainboard jumper standby and blu-on backlights should come on and stay on.

              Comment

              • nomoresonys
                Badcaps Legend
                • Jan 2013
                • 12075
                • U.S.
                #44
                Re: Need help with Samsung LN40E550f7f

                Try blu-on on with 5v, if that don't turn on backlight you may need to connect ps on blu on and 5v together.
                Last edited by nomoresonys; 02-23-2018, 04:47 PM.

                  Comment

                  • Kindred1
                    Senior Member
                    • Feb 2018
                    • 55
                    • USA
                    #45
                    Re: Need help with Samsung LN40E550f7f

                    Originally posted by nomoresonys
                    Connector off mainboard jumper standby and blu-on backlights should come on and stay on.
                    Ok. Which one is standby?

                      Comment

                      • nomoresonys
                        Badcaps Legend
                        • Jan 2013
                        • 12075
                        • U.S.
                        #46
                        Re: Need help with Samsung LN40E550f7f

                        Originally posted by Kindred1
                        Ok. Which one is standby?
                        the one with 5 v

                          Comment

                          • Kindred1
                            Senior Member
                            • Feb 2018
                            • 55
                            • USA
                            #47
                            Re: Need help with Samsung LN40E550f7f

                            There are 2. A5v and B5v

                              Comment

                              • nomoresonys
                                Badcaps Legend
                                • Jan 2013
                                • 12075
                                • U.S.
                                #48
                                Re: Need help with Samsung LN40E550f7f

                                Check video in post 40.

                                  Comment

                                  • nomoresonys
                                    Badcaps Legend
                                    • Jan 2013
                                    • 12075
                                    • U.S.
                                    #49
                                    Re: Need help with Samsung LN40E550f7f

                                    Originally posted by Kindred1
                                    There are 2. A5v and B5v
                                    Ok looked at your board again try A5 and blu-on.
                                    Last edited by nomoresonys; 02-23-2018, 05:09 PM.

                                      Comment

                                      • Kindred1
                                        Senior Member
                                        • Feb 2018
                                        • 55
                                        • USA
                                        #50
                                        Re: Need help with Samsung LN40E550f7f

                                        Originally posted by nomoresonys
                                        That is a little different, I think you can use either one.
                                        Actually, I was wrong, there are 3. p_dim, A5v and b5v.

                                          Comment

                                          • nomoresonys
                                            Badcaps Legend
                                            • Jan 2013
                                            • 12075
                                            • U.S.
                                            #51
                                            Re: Need help with Samsung LN40E550f7f

                                            You know what? I'm not sure about this particular board, might have to wait for one of the pros to lend a hand, sorry. I'm just not sure, no sense risking messing something up.

                                              Comment

                                              • nomoresonys
                                                Badcaps Legend
                                                • Jan 2013
                                                • 12075
                                                • U.S.
                                                #52
                                                Re: Need help with Samsung LN40E550f7f

                                                disregard.
                                                Last edited by nomoresonys; 02-23-2018, 05:47 PM.

                                                  Comment

                                                  • Kindred1
                                                    Senior Member
                                                    • Feb 2018
                                                    • 55
                                                    • USA
                                                    #53
                                                    Re: Need help with Samsung LN40E550f7f

                                                    Originally posted by nomoresonys
                                                    On mine it says like 3.3 or 5 v for blu on but I noticed your blu_on voltage is 13v so better not jumper those, I'm not sure what will happen.
                                                    I think you may have misread. BLU_ON is 0v

                                                      Comment

                                                      • nomoresonys
                                                        Badcaps Legend
                                                        • Jan 2013
                                                        • 12075
                                                        • U.S.
                                                        #54
                                                        Re: Need help with Samsung LN40E550f7f

                                                        That shopjimmy video in post 40, he is working on a samsung but I don't know if it has all the same workings as yours.

                                                          Comment

                                                          • nomoresonys
                                                            Badcaps Legend
                                                            • Jan 2013
                                                            • 12075
                                                            • U.S.
                                                            #55
                                                            Re: Need help with Samsung LN40E550f7f

                                                            Originally posted by Kindred1
                                                            I think you may have misread. BLU_ON is 0v
                                                            I missread.
                                                            Last edited by nomoresonys; 02-23-2018, 05:46 PM.

                                                              Comment

                                                              • nomoresonys
                                                                Badcaps Legend
                                                                • Jan 2013
                                                                • 12075
                                                                • U.S.
                                                                #56
                                                                Re: Need help with Samsung LN40E550f7f

                                                                http://www.shopjimmy.com/samsung-bn4...upply-unit.htm if you click the image it will magnify.
                                                                Last edited by nomoresonys; 02-23-2018, 05:30 PM.

                                                                  Comment

                                                                  • nomoresonys
                                                                    Badcaps Legend
                                                                    • Jan 2013
                                                                    • 12075
                                                                    • U.S.
                                                                    #57
                                                                    Re: Need help with Samsung LN40E550f7f

                                                                    Oh crap, my bad I was looking at row1, you can go ahead blu-on is'nt 13 v, it's the row 1 that has the 13.

                                                                      Comment

                                                                      • nomoresonys
                                                                        Badcaps Legend
                                                                        • Jan 2013
                                                                        • 12075
                                                                        • U.S.
                                                                        #58
                                                                        Re: Need help with Samsung LN40E550f7f

                                                                        Go ahead and jumper A5 and blu-on. Just make sure you get the right row by tracing it down your connector.
                                                                        Last edited by nomoresonys; 02-23-2018, 05:42 PM.

                                                                          Comment

                                                                          • Kindred1
                                                                            Senior Member
                                                                            • Feb 2018
                                                                            • 55
                                                                            • USA
                                                                            #59
                                                                            Re: Need help with Samsung LN40E550f7f

                                                                            Jumped it. No backlight.

                                                                              Comment

                                                                              • budm
                                                                                Badcaps Legend
                                                                                • Feb 2010
                                                                                • 40746
                                                                                • USA
                                                                                #60
                                                                                Re: Need help with Samsung LN40E550f7f

                                                                                Can I see the picture to show how you jump the pins of BL-ON (pin 6) and the A5V (pin 12)?
                                                                                Did you us resistor or you use jumper wire?
                                                                                I always use resistor in case the mistake is made by jumping the wrong pins together.
                                                                                Last edited by budm; 02-23-2018, 05:52 PM.
                                                                                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

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                                                                                http://www.badcaps.net/forum/showthr...er+testing+cfl

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

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