Technika X22/14B-GB-TCD-UK LCD screen went dark

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Fred53
    Member
    • Mar 2014
    • 33
    • United Kingdom

    #1

    Technika X22/14B-GB-TCD-UK LCD screen went dark

    Hi All, First Thread so be gentle

    Technika X22/14B-GB-TCD-UK LCD screen went dark. Upper half for a short time then the full screen went dark, still got sound and picture visible using a torch. Checked on start, backlights come on for 1 / 2 seconds then backlights switch off, DVD cycles, sound from speakers, Technika Logo visible, Menu functions etc visible with torch. LED on Front cycles from standby through amber then stays on green Everything seems to operating as normal except for backlights. I changed the Inverter as a cheapest option, but TV still has the same fault, any suggestions Please.
    Thanks
    Fred
    I don't like to leave a job I started unfinished
  • sordids999
    Badcaps Legend
    • May 2013
    • 2149
    • uk

    #2
    Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

    Pictures of boards ?

    Comment

    • multimeter
      Badcaps Veteran
      • Jan 2011
      • 739
      • united kingdom

      #3
      Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

      im assuming this tv is a 22"?,if it is ,and you have replaced the inverter,its very likely that the ccfls,(assuming not led tv)are failing/failed,and that would come under panel failiure.and not really worth it,another problem it could be,is that the psu may not be outtputting the correct voltages due to bad caps,underpowering the inverter
      Last edited by multimeter; 03-10-2014, 02:04 PM.
      fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

      ----------------------------------------------
      please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

      Comment

      • Fred53
        Member
        • Mar 2014
        • 33
        • United Kingdom

        #4
        Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

        Hi Multimeter,

        Thanks for the info. yes it is a 22" and not worth spending much on, PSU went about 6 months ago but there are no visible sign's of faults on the new one. or any cap's boards etc, but that doesn't mean the fault's aren't in there hiding

        I have been reading a thread with the same fault, different set, so I will follow it and see what develops there, may give me a hint.

        I was wondering if there is a way to bypass inverter protection, to test out the panel backlights that way?
        I read this thread but not sure if it is the way to go,
        Technika 22" - X21/14C-GB-TCD-UK - 2 secs to black
        Thanks Fred
        Last edited by Fred53; 03-11-2014, 01:59 AM.
        I don't like to leave a job I started unfinished

        Comment

        • sordids999
          Badcaps Legend
          • May 2013
          • 2149
          • uk

          #5
          Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

          Originally posted by Fred53
          Hi All, First Thread so be gentle

          Technika X22/14B-GB-TCD-UK LCD screen went dark. Upper half for a short time then the full screen went dark, still got sound and picture visible using a torch. Checked on start, backlights come on for 1 / 2 seconds then backlights switch off, DVD cycles, sound from speakers, Technika Logo visible, Menu functions etc visible with torch. LED on Front cycles from standby through amber then stays on green Everything seems to operating as normal except for backlights. I changed the Inverter as a cheapest option, but TV still has the same fault, any suggestions Please.
          Thanks
          Fred
          had the same problem bought this tv thinking it was the invertor to only find out the replacement did not work so swopped screens due to having another one of these with a power issue and all working
          i might have a spare screen laying around you can have,but ill check to be sure first

          Comment

          • Fred53
            Member
            • Mar 2014
            • 33
            • United Kingdom

            #6
            Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

            Hi sordids999,
            Thanks for that, I will look on ebay and see if I can find one as well.
            I might find a working one cheap, I don't like to leave a job I started unfinished
            Thanks Fred.
            I don't like to leave a job I started unfinished

            Comment

            • multimeter
              Badcaps Veteran
              • Jan 2011
              • 739
              • united kingdom

              #7
              Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

              the inverter ccfl plugs will be the small white connectors ,if you have any spare ccfl tubes lying around,you can use them to plug into the inverter,if they light up,and dosent shut down the tv,then its safe to say the tubes are gone(or even just one will cause this fault).
              fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

              ----------------------------------------------
              please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #8
                Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

                I have seen two of these now, both bad CCFL tubes.
                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

                • Alastair E
                  Chief Womble
                  • Mar 2013
                  • 1963
                  • U.K.

                  #9
                  Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

                  Tom's seen two.....

                  I guess I must have seen 200--ALL with bad CCFL tubes.....

                  I dont even bother with 'em now

                  TESCO'S Finest Shit!
                  TELEFIX

                  How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
                  http://www.irf.com/technical-info/appnotes/an-1088.pdf
                  PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

                  Comment

                  • multimeter
                    Badcaps Veteran
                    • Jan 2011
                    • 739
                    • united kingdom

                    #10
                    Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

                    Originally posted by Alastair E
                    Tom's seen two.....

                    I guess I must have seen 200--ALL with bad CCFL tubes.....

                    I dont even bother with 'em now

                    TESCO'S Finest Shit!
                    oddly,ive fixed around 20-25 of these,and only about 5 had CCFL issues!

                    i guess different factory's have different perks .........
                    fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!

                    ----------------------------------------------
                    please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!

                    Comment

                    • Fred53
                      Member
                      • Mar 2014
                      • 33
                      • United Kingdom

                      #11
                      Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

                      Originally posted by multimeter
                      oddly,ive fixed around 20-25 of these,and only about 5 had CCFL issues!

                      i guess different factory's have different perks .........

                      I haven't got a spare CCFL, is there any sort of ballast that I could use instead to test each socket on the invertor?
                      I don't like to leave a job I started unfinished

                      Comment

                      • budm
                        Badcaps Legend
                        • Feb 2010
                        • 40746
                        • USA

                        #12
                        Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

                        Make two of them for testing.
                        https://www.badcaps.net/forum/showth...er+testing+cfl
                        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

                        • Fred53
                          Member
                          • Mar 2014
                          • 33
                          • United Kingdom

                          #13
                          Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

                          Originally posted by budm

                          Thanks for that Gem, budm, I will be testing soon

                          AARGH Just checked my spares and only got 8w 9w and 11w will I be able to use 11Watt? by any chance!
                          Last edited by Fred53; 03-14-2014, 10:26 AM.
                          I don't like to leave a job I started unfinished

                          Comment

                          • budm
                            Badcaps Legend
                            • Feb 2010
                            • 40746
                            • USA

                            #14
                            Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

                            8, 9, 11 W in the form factor as shown in my pictures are fine, its the higher Wattages are the one that may not work.
                            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

                            • Fred53
                              Member
                              • Mar 2014
                              • 33
                              • United Kingdom

                              #15
                              Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

                              Brilliant Thanks again budm
                              I don't like to leave a job I started unfinished

                              Comment

                              • sordids999
                                Badcaps Legend
                                • May 2013
                                • 2149
                                • uk

                                #16
                                Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

                                What's the panel number I got a few laying around ?

                                Comment

                                • Fred53
                                  Member
                                  • Mar 2014
                                  • 33
                                  • United Kingdom

                                  #17
                                  Re: Technika X22/14B-GB-TCD-UK LCD screen went dark

                                  Originally posted by sordids999
                                  What's the panel number I got a few laying around ?
                                  I haven't stripped it down that far yet, sordids999, I had a look but the number must be under a board. the inverter was easy to get to 2 screws, I changed it like i said earlier, but same fault CCFL's on for a flash, when I get it stripped I will PM you the number ok, Thanks for the help.

                                  I want to try this 11W test bulb idea from Budm first, cool idea
                                  Last edited by Fred53; 03-14-2014, 11:49 AM.
                                  I don't like to leave a job I started unfinished

                                  Comment

                                  Related Topics

                                  Collapse

                                  • Ryan.man
                                    Macbook 2017 with touchbar (A1706) won't turn on after removing the screen
                                    by Ryan.man
                                    Hello everybody! Posting this in hopes somebody has some expertise that leads to a clear path of troubleshooting that saves me a lot of time!

                                    My macbook has the flex cable problem, the one that prevents the screen turning on. Ive been dealing with this for the last 3 years. Last year it went dead and I managed to fix it following youtube tutorials. But my fix wasnt the best, the problem returned a month later. This week, it went dead again. I again tried to fix it.

                                    This time the original cable broke too close to the screen, it can't be fixed without tearing the screen...
                                    02-04-2025, 12:23 PM
                                  • smic717394
                                    iphone XS turns off when press on screen.
                                    by smic717394
                                    Hi,

                                    I have a iphone XS that came in for a screen replacement, the screen was badly cracked, and inside missing scues, on the back of the screen still the blue protector, the screen was a LCD. So we replaced the screen and all good, installed the screen and we noticed that pressing the screen with a bit of force but not excessive, the phone dies. After plugging the charger it turns back on, but again if you press it it dies. I open the phone again, and I can't see anything major, with the phone open, if I press on the logic board, battery, charging board, or even putting pressure on...
                                    07-25-2024, 10:16 AM
                                  • Chrissygizmo
                                    Samsung UE55JU6800K half screen dark
                                    by Chrissygizmo
                                    Hello everyone, I’ve just been given a Samsung UE55JU6800K smart tv as it had white spots on the screen due to the led lenses falling off. After refitting them & putting the tv back together I thought it was a nice easy fix for a free bedroom tv , then I tried it before screwing the back into place. I realised that the right side of the screen was darker than the other side, I removed the screen again as I thought the backlights had failed but they are fine.
                                    I put the screen back in place & turned it back on . The screen seemed to be ok again but different screens on the same...
                                    02-10-2025, 12:33 AM
                                  • spice_disc
                                    Vizio TV M50-C1 reboot cycle and static on screen
                                    by spice_disc
                                    I'm currently trying to diagnose and fix my Vizio TV (Model M50-C1). I've tried a number of different basic solutions, but I'm trying to determine if my issue is currently a failing panel, T-Con board, or main board (or something else entirely) and whether or not it is worth my time to fix it. Details of the issue and what I've tried are below as well as why I think it is either a bad panel, T-Con board, or main board.

                                    The Issue: The TV will be on and working fine but after the TV is on for ~5-10 minutes the screen will freeze (with sound continuing) until the TV reboots itself. While...
                                    09-08-2024, 02:37 PM
                                  • ipatch
                                    ipad pro 9.7" blew a SMD component while replacing the screen 🤦‍♂️
                                    by ipatch
                                    i have an ipad pro 9.7" (1st gen) A1674 where i replaced the screen, but never attached the screen to the frame/chassis (glued down) due to the ipad being previously dropped so the new screen would never fit in the frame properly. so i need flex/bend the chassis to eventually fix the new screen in properly. so i temporarily just applied blue tape around the edges of the screen to keep it in place. when watching videos with the ipad the screen started flicker, so i though maybe the new quasi cheap amz screen i purchased was going out. so i disconnected then reconnected with power still on,...
                                    08-24-2024, 02:36 PM
                                  • Loading...
                                  • No more items.
                                  Working...