Saumsung le40b554m2w; Sound but no picture

Collapse
X
Collapse
 
  • Page of 2
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • donst
    Senior Member
    • Nov 2013
    • 56
    • uk
    #21
    Re: Saumsung le40b554m2w; Sound but no picture

    Hi mate, no problem i can see your busy with a few people and it's pretty easy to miss posts when threads here move so rapidly.

    I've measured the pins on PCI801S and for 1 and 2 i am getting 140V and 110V, and for pins 3 and 4 i am getting nothing whatsoever. It's also worth pointing out that when measuring pins 1 and 2 the picture turns on for around a few seconds then flickers and switches off and then back on again. This pattern continues until you remove the leads.

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK
        #22
        Re: Saumsung le40b554m2w; Sound but no picture

        OK, it seems like you have a fault with the UVLO circuit. This is a common fault on these models. Generally, placing a solder jumper across the pins 3 and 4 of that optocoupler will fix this issue.
        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

          Comment

          • donst
            Senior Member
            • Nov 2013
            • 56
            • uk
            #23
            Re: Saumsung le40b554m2w; Sound but no picture

            Originally posted by tom66
            Ahhh sorry totally missed your posts. Please identify if there is a small black, 4 legged device on your board labelled PCI801S. It will cross the boundary between primary and secondary. If so, please check the voltage between pins 3 and 4, the only two leads on the secondary side.
            Hi mate, just wanted to say thanks, only got round to the soldering today and it worked a treat, the picture is fine.

            Thanks again for your help, much appreciated!

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK
                #24
                Re: Saumsung le40b554m2w; Sound but no picture

                Glad to hear! Enjoy.
                Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                  Comment

                  • jamessblakey
                    New Member
                    • Jul 2014
                    • 1
                    • United Kingdom
                    #25
                    Re: Saumsung le40b554m2w; Sound but no picture

                    Hi guys i have exactly the same problem can anyone help me do this fix, ive heard that theres a jumper you can chop in half that resolves this problem please can someone help me tv is flickering like mad and sometimes screen just goes black with sound. if i unplug tv for few hours it will work fine for few hours? then start flickering qhite then start flickering black then finally stay black with sound. your help will be really appriciated

                      Comment

                      Previous 1 2 template Next

                      Related Topics

                      Collapse
                      • TR103
                        Samsung TV model UE50TU: rebooting, backlight, sound, but no picture
                        by TR103
                        Hi, I have a Samsung UE50TU with:
                        - sound and backlight, but no picture
                        - when it arrived, it had a picture for a few seconds
                        - it keeps rebooting
                        - without ribbon cable between the two panel boards, it does not reboot but I have no picture
                        - without cable between mainboard and lcd panel, it does not reboot (but obviously i have no picture)
                        - when i try a tape fix, its keeps rebooting, unless I tape off pin 1 (the innermost pin). In that case it does not reboot but I have no picture.

                        - without cable between mainboard and lcd panel and with a jumpered...
                        01-22-2025, 04:12 PM
                      • Mgiffune
                        Samsung UN60EH6000F Black Screen, Backlight and Sound Good. Power Cycle Returns Picture
                        by Mgiffune
                        I have a 60 inch Samsung UN60EH6000F flatscreen TV. The screen went black a few months ago Sound is good, backlight is good, no menu. I replaced the TCon board with a used board purchased from Ebay. It worked fine for a 3-4 months, then the screen started ‘fading' back. Once again, sound is good, backlight is good, no menu. However, this time the picture looks fine for about 10-15 minutes, then fades back. If I power cycle the TV, the display reappears, for another 10-15 minutes, then fades black again. Repeatable ever time.

                        I ordered a supposedly ‘new' Tcon board this time, and                        ...
                        06-09-2024, 10:28 AM
                      • Ierwin
                        Samsung UE60KU6079 backlight okay mainboard responsive, no picture, no sound
                        by Ierwin
                        Hello everyone,
                        Ive got a UE60KU6079 on the workbench that is giving me some headaches trying to troubleshoot.
                        The previous owner stated that there had been white dots on the screen which from the description sounded like some lenses fell of the backlight LEDs.
                        He had opened the TV from the back, trying to get to the backlight, supposedly gave up, reassebled everything and gave the TV to me.
                        I expected the worst like ripped COF cables or a cracked panel but could not find anything like that yet.
                        Anyway I still fully expect that there has been something seriously damaged...
                        05-13-2025, 03:31 PM
                      • jchang
                        Samsung UN70NU6900F no picture and no sound
                        by jchang
                        Hi all

                        I was just given a Samsung TV with the issue. I read various threads and videos and attempted the ribbon tape method to gain an image, but no luck.



                        Symptom:
                        No picture no sound.
                        When I plug in the power cord, Backlight LED turns on for a half second and then turns off. The red LED next to the power button located center bottom flashes 2 or 3 times. When the power button is pressed after, it does the same thing.
                        No sound at all.



                        What I tried:
                        1. I tried unplugging the left or right ribbon...
                        01-09-2023, 06:28 PM
                      • ChaosLegionnaire
                        what i went through dealing with my mobo with dead onboard sound!
                        by ChaosLegionnaire
                        so i took out one of my spare gigabyte ep35-ds3r mobos from storage for use to do some cpu, ram and video card testing of stuff i bought from ebay and got for free from momaka. he bought 50 e8400 cpus for cheap from ebay some years ago and i decided to help him relieve him of some of his supply since he had waaaay too many!! what did we say about hoarding too much stuff and depriving others of them?! *cough* socialism *cough* lol!

                        i had to blow some dust off the board and heatsinks with the datavac as i didnt clean it up before putting it in storage. after finishing...
                        09-13-2022, 09:02 AM
                      • Loading...
                      • No more items.
                      Working...