Samsung UE49KS7000SXXH - No standby light

Collapse
X
Collapse
 
  • Page of 4
  • Time
  • Show
Clear All
new posts
Previous 1 2 3 4 template Next
  • B0r1s
    Member
    • Jun 2022
    • 21
    • Serbia
    #21
    Re: Samsung UE49KS7000SXXH - No standby light

    Solder station arrived. Replaced all 4 diodes. Turned on tv without data cable, and picture showed. Tried few times..

    After reattached back cover and data cable, I turned it again, and after few minutes same problem, tv turned itself off and no standby light.. It turned itself off while i was in plex app and it was loading plex content.

    Tomorrow i will disassembly it again.

      Comment

      • nomoresonys
        Badcaps Legend
        • Jan 2013
        • 12206
        • U.S.
        #22
        Re: Samsung UE49KS7000SXXH - No standby light

        recheck those diodes, make sure they are ok.
        Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

          Comment

          • nomoresonys
            Badcaps Legend
            • Jan 2013
            • 12206
            • U.S.
            #23
            Re: Samsung UE49KS7000SXXH - No standby light

            make sure you didn't leave something unplugged and none of the connections are loose.
            Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

              Comment

              • nomoresonys
                Badcaps Legend
                • Jan 2013
                • 12206
                • U.S.
                #24
                Re: Samsung UE49KS7000SXXH - No standby light

                see if the voltages at connector are steady now, also check all solder joints on underside, examples of bad joints: https://www.google.com/search?q=bad+...ih=607&dpr=1.5
                Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                  Comment

                  • nomoresonys
                    Badcaps Legend
                    • Jan 2013
                    • 12206
                    • U.S.
                    #25
                    Re: Samsung UE49KS7000SXXH - No standby light

                    redo test of unhook cable from powerboard to mainboard, see if backlights come on and stay on.
                    Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                      Comment

                      • B0r1s
                        Member
                        • Jun 2022
                        • 21
                        • Serbia
                        #26
                        Re: Samsung UE49KS7000SXXH - No standby light

                        Originally posted by nomoresonys
                        make sure you didn't leave something unplugged and none of the connections are loose.
                        I rechecked diodes after i finished, readings were ok, and i was careful about polarity. And i checked cables few times also.. i will check standby voltage and diodes again tomorrow.

                          Comment

                          • B0r1s
                            Member
                            • Jun 2022
                            • 21
                            • Serbia
                            #27
                            Re: Samsung UE49KS7000SXXH - No standby light

                            But i noticed again fast ticking noise while tv is in standby mode. When tv is on, ticking noise is not present. This noise can only be heard from very small distance, maybe 10 cm.. so i don't know if that noise was present before..
                            Attached Files

                              Comment

                              • nomoresonys
                                Badcaps Legend
                                • Jan 2013
                                • 12206
                                • U.S.
                                #28
                                Re: Samsung UE49KS7000SXXH - No standby light

                                ok, do tests in post 24 and 25, if that checks out, maybe check the electrolytic caps right by the connector.
                                Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                  Comment

                                  • nomoresonys
                                    Badcaps Legend
                                    • Jan 2013
                                    • 12206
                                    • U.S.
                                    #29
                                    Re: Samsung UE49KS7000SXXH - No standby light

                                    be sure to check ALL the solder joints, look them over very closely, add a little solder to any that even look a little suspect, be careful not to solder bridge anything.
                                    Last edited by nomoresonys; 07-27-2022, 05:45 PM.
                                    Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                      Comment

                                      • nomoresonys
                                        Badcaps Legend
                                        • Jan 2013
                                        • 12206
                                        • U.S.
                                        #30
                                        Re: Samsung UE49KS7000SXXH - No standby light

                                        was that ticking there before you replaced the diodes?
                                        Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                          Comment

                                          • B0r1s
                                            Member
                                            • Jun 2022
                                            • 21
                                            • Serbia
                                            #31
                                            Re: Samsung UE49KS7000SXXH - No standby light

                                            Yes i noticed ticking noise after i removed back cover for the first time..

                                            I did have a bridge with the small solder spot, but i think i removed excess solder.. what are these solder spots that are placed around diodes, many small solder spots? They do not hold any components from the other side?

                                            Also i forgot to mention. When i replaced diodes i checked standby voltage and reading were:
                                            When in standby 9.55 (on board it says 7.5)
                                            When tv is on 12.83 ( on board it says 11.8)
                                            Maybe something useful, maybe not..
                                            Attached Files
                                            Last edited by B0r1s; 07-27-2022, 06:15 PM.

                                              Comment

                                              • nomoresonys
                                                Badcaps Legend
                                                • Jan 2013
                                                • 12206
                                                • U.S.
                                                #32
                                                Re: Samsung UE49KS7000SXXH - No standby light

                                                think those are the solders holding the heatsinks on, good rule to make sure those solders are in good shape too because they can also be a ground, do you get the steady backlights now, when you unhook the cable from powerboard to mainboard?
                                                Last edited by nomoresonys; 07-27-2022, 06:35 PM.
                                                Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                                  Comment

                                                  • nomoresonys
                                                    Badcaps Legend
                                                    • Jan 2013
                                                    • 12206
                                                    • U.S.
                                                    #33
                                                    Re: Samsung UE49KS7000SXXH - No standby light

                                                    good rule is unplug tv from power whenever hooking and unhooking cables, then plug back into power after the unhook to avoid any errant surges or such things.
                                                    Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                                      Comment

                                                      • nomoresonys
                                                        Badcaps Legend
                                                        • Jan 2013
                                                        • 12206
                                                        • U.S.
                                                        #34
                                                        Re: Samsung UE49KS7000SXXH - No standby light

                                                        see if you still have the steady ticking with cable from powerboard to mainboard unhooked and power cord plugged in.
                                                        Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                                          Comment

                                                          • B0r1s
                                                            Member
                                                            • Jun 2022
                                                            • 21
                                                            • Serbia
                                                            #35
                                                            Re: Samsung UE49KS7000SXXH - No standby light

                                                            I just opened tv, and again two diodes are shorted (one of these two) just like before. So i guess something is causing that diode to fail? I get 0.0 reading on both ends. And standby voltage is unstable and around 4-5v just like before. In short everything is like when we started. Tried unhooking motherboard, same behavior, light comes for a second and go out.

                                                            What can be a culprit?

                                                            Also i noticed now, with bad diode, ticking noise is slower (pauses between ticks are longer) when voltage was good after i replaced diodes, ticking intervals were so much shorter.

                                                            Video where you can hear it.

                                                            https://youtu.be/lAduhjNtqCA
                                                            Last edited by B0r1s; 07-28-2022, 04:56 AM.

                                                              Comment

                                                              • nomoresonys
                                                                Badcaps Legend
                                                                • Jan 2013
                                                                • 12206
                                                                • U.S.
                                                                #36
                                                                Re: Samsung UE49KS7000SXXH - No standby light

                                                                did you check all your new diodes before you put them in?
                                                                Last edited by nomoresonys; 07-28-2022, 09:49 AM.
                                                                Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                                                  Comment

                                                                  • B0r1s
                                                                    Member
                                                                    • Jun 2022
                                                                    • 21
                                                                    • Serbia
                                                                    #37
                                                                    Re: Samsung UE49KS7000SXXH - No standby light

                                                                    Originally posted by nomoresonys
                                                                    did you check all your new diodes before you put them in?
                                                                    Yes, several times, outaide of circuit and in after i put it.. i tried tv few times and tested diodes again. Everything was ok till tv shut down itself. I know what diode was shorted before, i will take out replaced diode in that place, i think that diode is shorted again..

                                                                      Comment

                                                                      • nomoresonys
                                                                        Badcaps Legend
                                                                        • Jan 2013
                                                                        • 12206
                                                                        • U.S.
                                                                        #38
                                                                        Re: Samsung UE49KS7000SXXH - No standby light

                                                                        seems like the diodes should have worked, wonder if you got a bad batch, data sheet there for 520-560: https://cdn.badcaps-static.com/pdfs/...3cbdc28824.pdf
                                                                        Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                                                          Comment

                                                                          • nomoresonys
                                                                            Badcaps Legend
                                                                            • Jan 2013
                                                                            • 12206
                                                                            • U.S.
                                                                            #39
                                                                            Re: Samsung UE49KS7000SXXH - No standby light

                                                                            and the resistors in that area are ok?
                                                                            Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                                                              Comment

                                                                              • B0r1s
                                                                                Member
                                                                                • Jun 2022
                                                                                • 21
                                                                                • Serbia
                                                                                #40
                                                                                Re: Samsung UE49KS7000SXXH - No standby light

                                                                                I just took out diode from position where last diode was shorted, and this one is also shorted.. other diodes are ok just like before. It is a bit strange that i got shorted diode again in the same spot.

                                                                                Resistors? Which ones? I only see one that is nex to heatsink.
                                                                                Attached Files

                                                                                  Comment

                                                                                  Previous 1 2 3 4 template Next

                                                                                  Related Topics

                                                                                  Collapse
                                                                                  • Kaar3l
                                                                                    Samsung QLED QE65Q7FNAT only standby light
                                                                                    by Kaar3l
                                                                                    TV: Samsung QLED QE65Q7FNAT
                                                                                    PSU: BN4400940A
                                                                                    MB: BN94-12832K

                                                                                    I got the tv in spring 2024. At that time it started, then ran 60 sec and poweroff. Seemed like reboot issue. I didn't have time and room to check it in summer so I plugged it in and now the standby light is on. I press button on remote, standby light goes off and tries to start?. No picture or backlight on LCD. I thought about removing diodes like in this thread: https://www.badcaps.net/forum/troubl...sung-qled-q60r...
                                                                                    09-24-2024, 01:35 PM
                                                                                  • m1ch43lzm
                                                                                    HP Pavilion 15-eh Board DAG7HAMB8F0 - CPU throttling to 0.4GHz (PROCHOT_EXT) and black screen
                                                                                    by m1ch43lzm
                                                                                    Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
                                                                                    Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic...
                                                                                    05-12-2025, 08:37 PM
                                                                                  • ohren
                                                                                    Upgrading a Samsung ue55nu7096u with logic board from an ue55ru7105k -- good idea?
                                                                                    by ohren
                                                                                    I hope this is the right forum to post in despite not technically being a repair, but still a question of swapping boards.

                                                                                    I thought I'd explore the possibility to upgrade an existing working Samsung ue55nu7096u with the logic board (and power board if needed) of a newer model (ue55ru7105k) of the same size and appearance (and resolution). The reason being I'd like the extra inputs of that board including component in, an extra HDMI port and bluetooth. Its panel is broken so I have no use for the board otherwise.

                                                                                    The models launched in 2018 and 2019 respectively....
                                                                                    09-08-2023, 05:24 PM
                                                                                  • howardc64
                                                                                    A1312 (27” iMac 2009-2011) A1407 (Thunderbolt Display) A1316 (Cinema Display) Display Black Screen Repair
                                                                                    by howardc64
                                                                                    Problem

                                                                                    This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached....
                                                                                    08-04-2024, 10:36 PM
                                                                                  • Michael Long
                                                                                    No Standby Light on Samsung UN65MU6300FXZA with Mainboard BN94-12440E
                                                                                    by Michael Long
                                                                                    I had a Dead Samsung UN65MU6300FXZA with Mainboard BN94-12440E
                                                                                    Dead / No Power / No Standby Light results after power company had three
                                                                                    consecutive power outages on/off/on/off/on/off after which TV was rendered unresponsive.

                                                                                    After exploring the issue found Mainboard was the fault. Then with research on this site determined IC1604 was the suspect. The IC1604 is a surface mounted device (SMD) EEPROM, Winbond Model 25Q40CLSIP. A read on this EEPROM came back with all FF FF FF FF FF in all registers blank and empty of data. I had a spare mainboard with intact IC1604 and utilized...
                                                                                    09-13-2022, 06:55 AM
                                                                                  • Loading...
                                                                                  • No more items.
                                                                                  Working...