Sony Bravia KDL26L5000 no power

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • fonthillhdtv
    Member
    • Aug 2011
    • 11
    #1

    Sony Bravia KDL26L5000 no power

    sony bravia will not power up, when i plug it in i hear a relay click but no light on the front and pressing the power button has no effect. Checked for any bulging caps none are obvious.
    I have attached some photos for you guys to look at any help would be greatly appreciated.
    Attached Files
    Tags: None
    • retiredcaps
      Badcaps Legend
      • Apr 2010
      • 9271
      #2
      Re: Sony Bravia KDL26L5000 no power

      You can start by checking the DC voltages on the connectors and comparing them to the legend.
      --- begin sig file ---

      If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

      We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

      Please do not post inline and offsite as they slow down the loading of pages.

      --- end sig file ---

        Comment

        • fonthillhdtv
          Member
          • Aug 2011
          • 11
          #3
          Re: Sony Bravia KDL26L5000 no power

          checking the voltages on cn6201 starting at the top
          reg 12v blk brwn red i get 12vdc
          then on the orange yellow green blue purple 0 vdc (This can't be good)
          grey ,white 16.5vdc
          blk labeled stby 3.3vdc
          brown ac-det 2.86vdc
          red p on 2.72vdc

          on the cn6202 connector i get 24.8vdc.

            Comment

            • fonthillhdtv
              Member
              • Aug 2011
              • 11
              #4
              Re: Sony Bravia KDL26L5000 no power

              Originally posted by fonthillhdtv
              checking the voltages on cn6201 starting at the top
              reg 12v blk brwn red i get 12vdc
              then on the orange yellow green blue purple 0 vdc (This can't be good)
              grey ,white 16.5vdc
              blk labeled stby 3.3vdc
              brown ac-det 2.86vdc
              red p on 2.72vdc

              on the cn6202 connector i get 24.8vdc.
              i hope these are the values you were looking for

                Comment

                • drpj23
                  Badcaps Veteran
                  • May 2012
                  • 528
                  • USA
                  #5
                  Re: Sony Bravia KDL26L5000 no power

                  If the rainbow wires are ground then they'll be zero. What does the main board look like?

                    Comment

                    • retiredcaps
                      Badcaps Legend
                      • Apr 2010
                      • 9271
                      #6
                      Re: Sony Bravia KDL26L5000 no power

                      Originally posted by fonthillhdtv
                      checking the voltages on cn6201 starting at the top
                      reg 12v blk brwn red i get 12vdc
                      then on the orange yellow green blue purple 0 vdc (This can't be good)
                      grey ,white 16.5vdc
                      blk labeled stby 3.3vdc
                      brown ac-det 2.86vdc
                      red p on 2.72vdc

                      on the cn6202 connector i get 24.8vdc.
                      All those voltages above look like they match the legend including the 0V for GND.

                      The only one I'm not 100% sure about is the ac-det pin. Tom66 is the expert on how it works there.
                      Last edited by retiredcaps; 09-10-2012, 12:01 PM.
                      --- begin sig file ---

                      If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                      We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                      Please do not post inline and offsite as they slow down the loading of pages.

                      --- end sig file ---

                        Comment

                        • tom66
                          EVs Rule
                          • Apr 2011
                          • 32560
                          • UK
                          #7
                          Re: Sony Bravia KDL26L5000 no power

                          AC-DET lets the motherboard know that the TV's plugged in and the power isn't going to cut out any time soon. It looks good to me.
                          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

                            • retiredcaps
                              Badcaps Legend
                              • Apr 2010
                              • 9271
                              #8
                              Re: Sony Bravia KDL26L5000 no power

                              Originally posted by tom66
                              AC-DET lets the motherboard know that the TV's plugged in and the power isn't going to cut out any time soon. It looks good to me.
                              Bookmarked!
                              --- begin sig file ---

                              If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                              We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                              Please do not post inline and offsite as they slow down the loading of pages.

                              --- end sig file ---

                                Comment

                                • tom66
                                  EVs Rule
                                  • Apr 2011
                                  • 32560
                                  • UK
                                  #9
                                  Re: Sony Bravia KDL26L5000 no power

                                  BTW, the only TV I've ever definitively seen an AC detect failure on is the LG 42PC1D plasma. It seems to be related to a bad series of "KA431" chips - the same as a TL431, basically a voltage detector. The fix of disabling it isn't ideal, but it is a simple way to fix it, and the LG TVs work fine with it - it only appears to affect things such as the audio "clicking" when the set turns off.

                                  On some TVs, the AC detect is 50, 60, 100 or 120 Hz square wave signal with a 5V level, so will appear to be about 2.5V. On others, it is a simple HIGH signal, and going LOW indicates a problem.
                                  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

                                    • fonthillhdtv
                                      Member
                                      • Aug 2011
                                      • 11
                                      #10
                                      Re: Sony Bravia KDL26L5000 no power

                                      from your responses then i gather the power board is functioning properly but alas the tv still will not turn on . any suggestions where to look next
                                      Thanks for the help

                                        Comment

                                        Previous template Next

                                        Related Topics

                                        Collapse
                                        • PopsCaps
                                          Sony Bravia KDL-40V2500 that will not power on
                                          by PopsCaps
                                          I have a Sony Bravia KDL-40V2500 that will not power on. The indicator flashes red 3 times.
                                          I do not hear any sound and I cannot see any backlight.
                                          I have tried disconnecting every cable on each board one at a time to see if anything changes.
                                          The only change is when I disconnect AC-DET cable on the Power Supply board or on the other end if I unplug the CN7009 connection on the B-Board and try to power on the TV the indicator will stay on solid green until I power off.
                                          My friend ordered another used power supply board but it is also doing the red indicator flash 3 times...
                                          03-25-2025, 11:23 AM
                                        • Tynan Dill
                                          Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
                                          by Tynan Dill
                                          I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

                                          Upon bringing it home and plugging it up, it showed a standby light.

                                          I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

                                          The screen seems to blackout and stay black, but with a flashlight I can see the display.

                                          With my Playstation 4 connected via HDMI, and running a game I can hear sound.

                                          Assuming...
                                          ORIGINAL POWER SUPPLY BOARD
                                          7 Photos
                                          11-22-2024, 01:46 PM
                                        • PantherDave
                                          Microsoft Surface Pro (5th gen) model 1796 - no power
                                          by PantherDave
                                          Hi all!

                                          I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅

                                          I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
                                          https://www.badcaps.net/forum/troubl...-hardware-devi...
                                          05-29-2024, 02:01 PM
                                        • GLISIT
                                          Asus Probook P5440UF-XB74 power issue
                                          by GLISIT
                                          Hi all,

                                          TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!


                                          I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!

                                          A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about...
                                          01-16-2025, 02:29 PM
                                        • repair-it
                                          SONY Bravia OLED XR-77A80J will not power on
                                          by repair-it
                                          SONY XR-77A80J shuts off as soon as it is powered on. It goes into standby ok when plugged in but when power button is pressed, relay clicks and tv powers off. Power supply board makes a sound that sounds like momentary coil whine when it clicks off. The main board appears to turn on and has working optical.

                                          I pulled the power supply board for visual inspection & there wasn't anything obvious. I am not sure how to go about testing this OLED as it is a bit different than the last one (LG) I tried to repair. The only voltage listed on the PSU is 12v for T-CON. The 12v is not present...
                                          01-24-2024, 10:15 PM
                                        • Loading...
                                        • No more items.
                                        Working...