Help for Hitachi 42HDX99

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • purplebird05
    New Member
    • Aug 2010
    • 8
    #1

    Help for Hitachi 42HDX99

    TV goes through power cycles when turned on. Stays on for 5-10 seconds then turns off for 5-10 seconds. This process is repeated until the tv is unplugged. I replaced two potentially bad caps (very slight bulging) without improvement. Next step?

    The blue light on the front of the TV flashes 8 times. I am having trouble locating a service manual, any suggestions?
    Tags: None
    • seanc
      Badcaps Legend
      • Nov 2008
      • 1319
      #2
      Re: Help for Hitachi 42HDX99

      The power supply is shutting down and restarting.

      We need clear pictures of the power board, back and front.

        Comment

        • purplebird05
          New Member
          • Aug 2010
          • 8
          #3
          Re: Help for Hitachi 42HDX99

          You can see the pictures here...

          http://i838.photobucket.com/albums/z...PowerBoard.jpg
          http://i838.photobucket.com/albums/z...2HDX99Back.jpg

            Comment

            • retiredcaps
              Badcaps Legend
              • Apr 2010
              • 9271
              #4
              Re: Help for Hitachi 42HDX99

              Originally posted by purplebird05
              You can see the pictures here...
              Your pictures are a bit out of focus and low resolution.

              1) Post clear focused pictures of your boards after reading

              https://www.badcaps.net/forum/showthread.php?t=1868

              2) Please do not post pictures inline as they slow down the loading of pages.

              3) For best picture quality and clarity take your boards to a window on a sunny day, turn flash off, and use macro mode. Take a top down view of all your boards (front and back). Make sure the photo is legible so that we can read the PCB printing clearly. A shutter speed of 1/125 or faster will produce nice clear focused pictures. Try to get a photo that is 2000x2000 resolution or as close as possible.
              --- 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

                • purplebird05
                  New Member
                  • Aug 2010
                  • 8
                  #5
                  Re: Help for Hitachi 42HDX99

                  Try viewing these...

                  http://s838.photobucket.com/albums/zz304/Purplebird05/

                    Comment

                    • PlainBill
                      Badcaps Legend
                      • Feb 2009
                      • 7034
                      • USA
                      #6
                      Re: Help for Hitachi 42HDX99

                      Originally posted by purplebird05
                      Try viewing these...

                      http://s838.photobucket.com/albums/zz304/Purplebird05/
                      https://www.badcaps.net/forum/showthread.php?t=1868

                      PlainBill
                      For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                      Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                        Comment

                        • Nate M.
                          New Member
                          • Mar 2011
                          • 1
                          #7
                          Re: Help for Hitachi 42HDX99

                          purplebird05,

                          Did you ever find a solution to your 42HDX99 shutting off and coming back on? I have the same TV with the same problem. Please let me know.

                            Comment

                            Previous template Next

                            Related Topics

                            Collapse
                            • twonk9098
                              Lenovo Legion 5 high fan spin turns off after 34 seconds
                              by twonk9098
                              Hi all,

                              I have a Lenovo Legion 5 with a Ryzen 7 series CPU and RTX 3070 GPU. My issue is that it turns on and all seems fine except after a few seconds the fans spin up high and the laptop turns off after 34 seconds.
                              I can get into bios and can even boot and login to Windows however after 34 seconds no matter if Im at the bios screen or booted into Windows it will just turn off.

                              I have managed to run HWmonitor and the temperatures of the CPU and GPU are fine, I can also touch the heatsync which is warm but not hot.

                              I have tried a few new bios but exactly...
                              07-14-2024, 11:19 AM
                            • liquidzorch
                              Lenovo 15iml05 Power led lights for 12 seconds then off 12 seconds
                              by liquidzorch
                              Hello. I bought a faulty Lenovo ideapad 3, but it turns out the 3Valw buck converter burnt a hole through the board. I was able to clean it up, and remove all the shorts. I now can power the 3.3v rails from a bench power suppy while connecting the laptop to its psu, and I get the additional 5valw, 1.8v, and 1.05v, form what I can tell in the schematics, those are the only 4 voltages I should see before turning on, and they are present. When I hit the power button, the power indicator on the left side turns on (not the one on the power button), stays on for about 12 seconds, then turns off for...
                              10-18-2024, 05:19 PM
                            • Rick_1234
                              LG 23MP55HQ LED Monitor turns off after a few seconds or flickers.
                              by Rick_1234
                              Good evening, gentlemen.

                              I have a problem with my monitor. It turns off after a few seconds or flickers. Shining a flashlight on the screen doesn't show any image, so I guess it's not the "2 seconds to dark" I read in the forum.

                              To turn it back on, I have to press the power button twice. Then after a few seconds it turns off again or flickers. See video.
                              https://drive.google.com/file/d/1L6S...ew?usp=sharing


                              Things I tried

                              - Bought a new AC adapter thinking that was the problem but the problem...
                              06-22-2024, 04:44 PM
                            • PowellSkier
                              Harman/Kardon AVR 645 returning to stand-by after a few seconds.
                              by PowellSkier
                              A Harman/Kardon AVR 645 repair has been a hobby of mine for the past several years. My latest attempt involved the purchase of a DOA unit for part swapping and testing. The original AVR would power up then shut down after a few seconds. I completely tore down both units, found a couple of bad components and reassembled one of them. Same issue, no speakers connected. After extensive research I found a repair document from Harman/Kardon that explains the protection circuit in fantastic detail and provides specific test points for each fault (power, DC detection, overload & power) and the voltage...
                              06-17-2024, 11:43 AM
                            • AlexVG
                              Macbook A1466 820-00165 resets every 10 seconds
                              by AlexVG
                              Hi,
                              It have had a problem with U7100 and short circuit in Q7130.
                              I replaced them.


                              It starts now and waiting 20 seconds and then starts to reset PM_SLP_S4_L every 10 seconds.
                              Almost all voltages rising
                              except U3090 and U3210 (LED) - not receives enable signal.

                              U4500 is trying to rise - receives enable only 2-3 seconds

                              Here is my measuring of important signals.

                              What else could be the problem?



                              I need to help.
                              Thank you an advance....
                              11-09-2023, 07:19 AM
                            • Loading...
                            • No more items.
                            Working...