LCD TV and Monitor basic troubleshooting guides

Collapse
This is a sticky topic.
X
X
Collapse
 
  • Page of 23
  • Time
  • Show
Clear All
new posts
Previous 1 2 3 4 5 6 7 8 9 10 11 23 template Next
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA
    #1

    LCD TV and Monitor basic troubleshooting guides

    I cannot find the original post so this is the new post that I will have it liked to my signature file. It will be good if it can be on the sticky.

    Notes: When make voltage measurement in the DEADLY Primary (HOT) side, the negative leg of the LARGE filter cap will be the ground ref.
    The chassis will be the ground ref for the Secondary (COLD) side.
    You should at least plug the unit you are working on into the GFCI outlet for safety.
    Attached Files
    Last edited by budm; 01-23-2013, 12:54 PM.
    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
    Tags: None
    • Stuck
    • Beowulf
      Senior Member
      • Dec 2012
      • 175
      • USA
      #2
      Re: LCD TV and Monitor basic troubleshooting guides

      Thanks Bud M.

      Have not seen it yet and I already like it.

        Comment

        • Steve.B
          Senior Member
          • Dec 2008
          • 83
          • UK
          #3
          Re: LCD TV and Monitor basic troubleshooting guides

          Great job Bud M. Very handy and informative guides. I am sure these will be of great use to a lot of people. Certainly agreed that these should be 'stickied'.

            Comment

            • Beowulf
              Senior Member
              • Dec 2012
              • 175
              • USA
              #4
              Re: LCD TV and Monitor basic troubleshooting guides

              Oops forgot to say I vote for this to be stickied.

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK
                  #5
                  Re: LCD TV and Monitor basic troubleshooting guides

                  Excellent guides. Sticky please! Along with the factory reset guide of Randtek's that got buried.
                  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

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA
                      #6
                      Re: LCD TV and Monitor basic troubleshooting guides

                      Yes, the stickied for the factory reset too, that is really good one.
                      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

                        • retiredcaps
                          Badcaps Legend
                          • Apr 2010
                          • 9271
                          #7
                          Re: LCD TV and Monitor basic troubleshooting guides

                          I'll ask ratdude747 (moderator) to make this a sticky. He's a reasonable person to work with and quick to respond when he's not busy with school.

                          This will hopefully decrease the frequent questions and workload for everyone.
                          Last edited by retiredcaps; 01-23-2013, 07:02 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

                            • ratdude747
                              Black Sheep
                              • Nov 2008
                              • 17136
                              • USA
                              #8
                              Re: LCD TV and Monitor basic troubleshooting guides

                              Originally posted by retiredcaps
                              I'll ask ratdude747 (moderator) to make this a sticky. He's a reasonable person to work with and quick to respond when he's not busy with school.

                              This will hopefully decrease the frequent questions and workload for everyone.
                              BAM!

                              Thread stuck.
                              sigpic

                              (Insert witty quote here)

                                Comment

                                • tom66
                                  EVs Rule
                                  • Apr 2011
                                  • 32560
                                  • UK
                                  #9
                                  Re: LCD TV and Monitor basic troubleshooting guides

                                  Originally posted by ratdude747
                                  BAM!

                                  Thread stuck.
                                  Is it possible to sticky this one, too?
                                  https://www.badcaps.net/forum/showthread.php?t=24809
                                  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

                                    • tibimakai
                                      Badcaps Legend
                                      • Jan 2012
                                      • 3680
                                      • USA
                                      #10
                                      Re: LCD TV and Monitor basic troubleshooting guides

                                      Excellent work Bud!!
                                      May I ask you, if you could include in these documents, some pictures with the standby voltage area(or other important areas of the device), the most important ICs(and what they do), how do we know if the PS should have 166V or 450V.

                                        Comment

                                        • Foppel
                                          Senior Member
                                          • Jan 2013
                                          • 62
                                          • Germany
                                          #11
                                          Re: LCD TV and Monitor basic troubleshooting guides

                                          Hi Budm i like your cats Thanks for the Links. This page also helps me a lot: http://youclickspk.blogspot.de/p/tes...l#.UQF8yGf3G71

                                          cheers - Foppel

                                            Comment

                                            • budm
                                              Badcaps Legend
                                              • Feb 2010
                                              • 40746
                                              • USA
                                              #12
                                              Re: LCD TV and Monitor basic troubleshooting guides

                                              This is SONY training manual for the T-CON.
                                              Attached Files
                                              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

                                                • ohmmy
                                                  Senior Member
                                                  • Jan 2013
                                                  • 182
                                                  • USA
                                                  #13
                                                  Re: LCD TV and Monitor basic troubleshooting guides

                                                  Wow great little tutorial budm. Explains things neatly and in correct sequence. Great guide!

                                                    Comment

                                                    • coxtel81
                                                      New Member
                                                      • Feb 2013
                                                      • 2
                                                      • ROMANIA
                                                      #14
                                                      Re: LCD TV and Monitor basic troubleshooting guides

                                                      Excellent work

                                                        Comment

                                                        • dejesus
                                                          Senior Member
                                                          • Jan 2013
                                                          • 108
                                                          • usa
                                                          #15
                                                          Re: LCD TV and Monitor basic troubleshooting guides

                                                          This inf. is great. A lot to learn in this side. hard to find inf. like this. Great!!!

                                                            Comment

                                                            • budm
                                                              Badcaps Legend
                                                              • Feb 2010
                                                              • 40746
                                                              • USA
                                                              #16
                                                              Re: LCD TV and Monitor basic troubleshooting guides

                                                              TFT voltages:
                                                              Sanyo LCD display training manual.
                                                              AS15G (EC5575) spec

                                                              Washed out picture:
                                                              https://www.badcaps.net/forum/showth...mma#post304275
                                                              Attached Files
                                                              Last edited by budm; 02-14-2013, 11:38 PM.
                                                              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

                                                                • rukmani
                                                                  New Member
                                                                  • Mar 2013
                                                                  • 2
                                                                  • india
                                                                  #17
                                                                  Re: LCD TV and Monitor basic troubleshooting guides

                                                                  thank sir good work...................

                                                                    Comment

                                                                    • Ahakim
                                                                      Member
                                                                      • Apr 2013
                                                                      • 64
                                                                      • USA
                                                                      #18
                                                                      Re: LCD TV and Monitor basic troubleshooting guides

                                                                      Need full Schematic of LG 32LD330 model. Who can help???...

                                                                        Comment

                                                                        • HerbTech1
                                                                          New Member
                                                                          • Apr 2013
                                                                          • 2
                                                                          • Canada
                                                                          #19
                                                                          Re: LCD TV and Monitor basic troubleshooting guides

                                                                          Thank you very much for this post. Lots of good reading ahead.

                                                                            Comment

                                                                            • sinaaa
                                                                              New Member
                                                                              • Apr 2013
                                                                              • 1
                                                                              • syria
                                                                              #20
                                                                              Re: LCD TV and Monitor basic troubleshooting guides

                                                                              Need full Schematic of samsung ln32c450e1d model. Who can help?

                                                                                Comment

                                                                                Previous 1 2 3 4 5 6 7 8 9 10 11 23 template Next

                                                                                Related Topics

                                                                                Collapse
                                                                                • momaka
                                                                                  HannStar Hanns-G HC194d LCD monitor repair
                                                                                  by momaka
                                                                                  Normally, I never post repairs this quick after I do them, because… I am usually very slow. But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though. I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
                                                                                  03-15-2023, 10:17 PM
                                                                                • wattage
                                                                                  AOC AG493UCX 49-inch monitor - Firmware request
                                                                                  by wattage
                                                                                  Hello Badcaps Community,

                                                                                  I purchased a preowned AOC monitor that is not working and out of warranty. It was sold as not working. I am looking for guidance on self-repair. In particular, I am after the firmware for the monitor. At the end, I have included monitor model information and links to pics and vids of the issue.

                                                                                  The problem is that it will not display a picture on any of its inputs. And the on-screen menu does not appear. The power button works properly. It powers on with the remote as well. But the on-screen menu does not appear, even when not connected to any...
                                                                                  07-13-2025, 04:41 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
                                                                                • momaka
                                                                                  Wise Wing F199 19'' LCD monitor - recapped
                                                                                  by momaka
                                                                                  Looking through my repair pictures and notes, it's been a long time since I posted anything in the LCD monitors section. So here goes that.

                                                                                  I'm dedicating this thread to one of the very first LCD monitors I repaired (if not the first one), which was more than 10 years ago now. The monitor is a Wise Wing, model F199. It's a 19” CFL-backlit LCD. I got it for free off of Craigslist in 2009 from a guy, who said he bought it for cheap from Wallmart and the monitor worked only for a little less than 2 years before quitting.

                                                                                  When I saw the Craigslist post, I wasn't...
                                                                                  08-24-2020, 10:58 AM
                                                                                • sew333
                                                                                  Pc shutdown, monitor flickered with no signal after 10 seconds
                                                                                  by sew333
                                                                                  My pc:
                                                                                  10850K stock 4800mhz stock Kraken X73 good temps
                                                                                  2x16 GB DDR4 GSKILL 3000mhz XMP
                                                                                  Seasonic Tx-850 Ultra Titanium
                                                                                  Gigabyte Rtx 3090 Gaming OC
                                                                                  Aorus Z490 Pro Gaming
                                                                                  1 TB SSD


                                                                                  4 weeks ago i launched Metro Exodus Enhanced and during cinematic advertisement part ( 30 fps ), pc just shutdown.
                                                                                  Also monitor flickered with NO SIGNAL 10 seconds after shutdown. So only monitor and pc was affected.

                                                                                  Next i pressed only power button, rebooted again and its fine again. Happened once and i cant reproduce.


                                                                                  Power...
                                                                                  02-22-2022, 10:27 AM
                                                                                • Loading...
                                                                                • No more items.
                                                                                Working...