Wharfedale LCD42F1080P comes on but then picture turns off

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • shepp
    Badcaps Veteran
    • Mar 2012
    • 377
    • England

    #21
    Re: Wharfedale LCD42F1080P comes on but then picture turns off

    i think thats the coil winding off the transformer tho not the bulb

    Comment

    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK

      #22
      Re: Wharfedale LCD42F1080P comes on but then picture turns off

      Originally posted by shepp
      or shall i just disconnect them one by one and see if it stays on?
      Do this in a dark room, if the screen flickers with each individually the bulb is probably good.
      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

      • shepp
        Badcaps Veteran
        • Mar 2012
        • 377
        • England

        #23
        Re: Wharfedale LCD42F1080P comes on but then picture turns off

        just gone through em all one by one and they all light up no flickering, on then after a couple a seconds go off again, i have noticed one transformer seems to make some noise, starts buzzing then sqeals before the light goes off

        not sure if i should just buy that ebay item or not, coz its hard to source the transformers unless i get them from u.s but there $20 each i think so for £35ish i could get the ebay one? unless i could get a replacement transformer equivilent over here?
        Last edited by shepp; 05-05-2012, 08:56 AM.

        Comment

        • shepp
          Badcaps Veteran
          • Mar 2012
          • 377
          • England

          #24
          Re: Wharfedale LCD42F1080P comes on but then picture turns off

          just noticeed this, do the ribbon cables just push in? cause i cant see a clip or any thing on this type? and it wont push in any further

          help please
          Attached Files

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #25
            Re: Wharfedale LCD42F1080P comes on but then picture turns off

            Those look about right.
            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

            • shepp
              Badcaps Veteran
              • Mar 2012
              • 377
              • England

              #26
              Re: Wharfedale LCD42F1080P comes on but then picture turns off

              o right do they just push in and pull out then?

              only all the other 6 look like the one on the right

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #27
                Re: Wharfedale LCD42F1080P comes on but then picture turns off

                Originally posted by shepp
                o right do they just push in and pull out then?

                only all the other 6 look like the one on the right
                They just push in... sometimes there is a latch to hold them in, but not always.
                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

                • vinceroger69
                  Badcaps Legend
                  • Mar 2012
                  • 6714
                  • uk

                  #28
                  Re: Wharfedale LCD42F1080P comes on but then picture turns off

                  the one you have highlighted does look a little further out when you pull the ribbon cable out is the end of the cable ok no tracks lifted? stopping it going all the way in may be shine a light in the connector just to comfirm there nothing out of place in the socket? bent pins or whatever in there.

                  Comment

                  • shepp
                    Badcaps Veteran
                    • Mar 2012
                    • 377
                    • England

                    #29
                    Re: Wharfedale LCD42F1080P comes on but then picture turns off

                    ok thanks mate, think i might have to bite the bullet on this one then and order the invertor boards

                    ill check that now vince

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK

                      #30
                      Re: Wharfedale LCD42F1080P comes on but then picture turns off

                      Originally posted by shepp
                      ok thanks mate, think i might have to bite the bullet on this one then and order the invertor boards

                      ill check that now vince
                      Before you do that... Check the ON/OFF and DIM pins on the inverter.
                      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

                      • shepp
                        Badcaps Veteran
                        • Mar 2012
                        • 377
                        • England

                        #31
                        Re: Wharfedale LCD42F1080P comes on but then picture turns off

                        Originally posted by tom66
                        Before you do that... Check the ON/OFF and DIM pins on the inverter.
                        which ones are they? the invertor to tcon?

                        i check the on/off voltages before and they were fine and also the dim was getting a reading, just gonna whip cover off the t con now just to check the ribbon cables in properly, i had it working for a short time(5mins) the other day until i hit the menu button and it went off again

                        Comment

                        • tom66
                          EVs Rule
                          • Apr 2011
                          • 32560
                          • UK

                          #32
                          Re: Wharfedale LCD42F1080P comes on but then picture turns off

                          Originally posted by shepp
                          which ones are they? the invertor to tcon?

                          i check the on/off voltages before and they were fine and also the dim was getting a reading, just gonna whip cover off the t con now just to check the ribbon cables in properly, i had it working for a short time(5mins) the other day until i hit the menu button and it went off again
                          Inverter to PSU. Since it is intermittent, I would suspect a cold joint or a loose connection.
                          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

                          • shepp
                            Badcaps Veteran
                            • Mar 2012
                            • 377
                            • England

                            #33
                            Re: Wharfedale LCD42F1080P comes on but then picture turns off

                            just been through a few but gonna have to wait til later now cause the Mrs has got family round so ive been told ive got to be social...lol

                            will report back later on

                            Comment

                            • shepp
                              Badcaps Veteran
                              • Mar 2012
                              • 377
                              • England

                              #34
                              Re: Wharfedale LCD42F1080P comes on but then picture turns off

                              bought new invertor boards off ebay and just replaced the master and its up and running now, thanks guys once again for the input, the board has got a hot spot on it so im guessing its burnt something out, just hope i can sell the slave and get some money back for that

                              Comment

                              • tom66
                                EVs Rule
                                • Apr 2011
                                • 32560
                                • UK

                                #35
                                Re: Wharfedale LCD42F1080P comes on but then picture turns off

                                Originally posted by shepp
                                bought new invertor boards off ebay and just replaced the master and its up and running now, thanks guys once again for the input, the board has got a hot spot on it so im guessing its burnt something out, just hope i can sell the slave and get some money back for that
                                The faulty master is worth money too as the majority of the transformers on it are probably okay.
                                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

                                • shepp
                                  Badcaps Veteran
                                  • Mar 2012
                                  • 377
                                  • England

                                  #36
                                  Re: Wharfedale LCD42F1080P comes on but then picture turns off

                                  do you think i should list em both or seperate on ebay?

                                  Comment

                                  • tom66
                                    EVs Rule
                                    • Apr 2011
                                    • 32560
                                    • UK

                                    #37
                                    Re: Wharfedale LCD42F1080P comes on but then picture turns off

                                    Originally posted by shepp
                                    do you think i should list em both or seperate on ebay?
                                    List them separately... only parts resellers will want the faulty one... you might get a few quid for it.
                                    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

                                    • shepp
                                      Badcaps Veteran
                                      • Mar 2012
                                      • 377
                                      • England

                                      #38
                                      Re: Wharfedale LCD42F1080P comes on but then picture turns off

                                      thanks tom, will do that

                                      Comment

                                      • comptek
                                        Badcaps Veteran
                                        • Aug 2013
                                        • 606
                                        • uk

                                        #39
                                        Re: Wharfedale LCD42F1080P comes on but then picture turns off

                                        hi this is my first post so please dont shoot!

                                        i have a Wharfedale LCD42F1080P and i am having issues with it
                                        i turn it on after a few mins you can see a faint flickering even more so when its a bright background during an advert for example
                                        then after a while picture goes but still have sound, i can turn it off and on again and it will do the same

                                        i measured the inverter side and im getting 21.?v when lit and 23.?v when the screens gone off and sound still on... im guessing its a flakey power supply or main inverter i was given it after someone tried fixing it

                                        Comment

                                        • comptek
                                          Badcaps Veteran
                                          • Aug 2013
                                          • 606
                                          • uk

                                          #40
                                          Re: Wharfedale LCD42F1080P comes on but then picture turns off

                                          sorry i forgot to say thank you

                                          Comment

                                          Related Topics

                                          Collapse

                                          • Tr0ll
                                            T-con suspect issue. Both ribbon cables no picture. One ribbon cable ok. (58pus8545)
                                            by Tr0ll
                                            Hi guys! I realized you have a lot of knowledge here so i am hoping you could point me in right direction with my odd issue.

                                            The Tv is a Philips 58PUS8545/12, it had no picture but working backlights.

                                            Original T-con:
                                            Opened the Tv and tested to unplug one ribbon cable at a time. With this test i could see that i got fine picture on both halves as long as there was only one ribbon cable connected, with two connected picture were gone.

                                            First replacement T-con:

                                            I thought it might be t-con and ordered new t-con from china(supposedly tested)...
                                            10-07-2023, 07:48 PM
                                          • ItepK
                                            LG 32LG3000 TV, three red light flashes, then the backlight turns on, but no picture
                                            by ItepK
                                            Hello everyone! I've found this television, and I began troubleshooting it.

                                            First, the television kept rapidly power cycling. I've warmed up the capacitors with a hairdryer, and after 3 dimmed red blinks, the backlight turned on, then turned dim, and no picture was present on the screen.

                                            I believed that this was caused by a bad power supply producing insufficent power (I've measured 3.5v on the 5.2v rail), so I've blindly recapped the board.

                                            After the recapping, all the voltages stableized, however, the issue in the title still remains.

                                            I could...
                                            01-03-2025, 09:01 AM
                                          • burbutsalos
                                            55" QLED QE55Q60T Turns on after 1 minute the picture goes bad and get in boot loop
                                            by burbutsalos
                                            Hello ,
                                            The issue with this set is that it turn on just fine and after a minute or so the picture shows either vertical lines or turns half black and from that point on starts a boot loop.
                                            If a let the unit to cool down for a minute the same pattern starts again. i had exactly the same mainboard as a spare and replaced it but nothing changed.

                                            Any ideas what to check?...
                                            12-12-2023, 06:06 AM
                                          • JJAAMM
                                            SAMSUNG UN55KS9000F picture fades then distorts into vertical lines after 20 seconds
                                            by JJAAMM
                                            This was my main TV for the last 6 years. I'm not inclined to throw out a $2600 TV so quickly so I'm trying to investigate the issue.

                                            Problem
                                            TV was disconnected from power for 6 months during construction. When I plugged it yesterday picture was fine, after 30 seconds it dimmed then started developing horizontal lines, picture then starts to ghost vertically until it degrades into vertical streaks. TV always displays a perfect picture when cold. I can unplug TV for 5 minutes and plug it back in and picture is restored for 20 seconds. I can also keep it in standby mode...
                                            07-06-2023, 06:01 AM
                                          • 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
                                          • Loading...
                                          • No more items.
                                          Working...