Emerson LC401EM3F will not turn on

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • deaddude429
    Member
    • Dec 2012
    • 15
    • USA
    #1

    Emerson LC401EM3F will not turn on

    Emerson LC401EM3F was in a house that was stuck by lightning and will no longer turn on. When plugged up or power button pressed red light comes on and blinks about 14-15 times then stops and stays red. Also can here the big capacitor click coming on and then again when off. I tested big cap and its read 340 or so on power on and when powers off goes down to 100. I noticed a burn spot on the bottom of the power board and on the LCD metal housing. I have tested every diode and have found 2 (circled red in pic) they read 57 both ways, and then a group of diodes (in the green circle) read fine the right way but will when switched but will continue to go up to about 2000 and then read as open connection on my multimeter while all the others read ~500.
    Attached Files
    Tags: None
    • selldoor
      Slow Learner
      • Dec 2010
      • 7870
      #2
      Re: Emerson LC401EM3F will not turn on

      If we are to spot problems we need to see GOOD pictures of YOUR boards.
      You didnt even post it the same way round is it the joint on the 345v link
      that has shorted out?
      Last edited by selldoor; 08-17-2014, 12:03 PM.
      Please upload pictures using attachment function when ask for help on the repair
      http://www.badcaps.net/forum/showthread.php?t=39740

        Comment

        • multimeter
          Badcaps Veteran
          • Jan 2011
          • 739
          • united kingdom
          #3
          Re: Emerson LC401EM3F will not turn on

          check thermistor,varistor,bridge rectifier,all fuses,controller ic and surrounding components,also check output diodes from the smps transformer
          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

            • multimeter
              Badcaps Veteran
              • Jan 2011
              • 739
              • united kingdom
              #4
              Re: Emerson LC401EM3F will not turn on

              scrub the thermistor ,there arnt none,unless ive missed it..
              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

                • deaddude429
                  Member
                  • Dec 2012
                  • 15
                  • USA
                  #5
                  Re: Emerson LC401EM3F will not turn on

                  Sorry I had the pictures just forgot to upload them. The short as not on the actual leg of the big capacitor but next to it off of the a jumper wire. I checked the main fuse its good and the varistor show open connection.

                  the image uploader wouldn't work so here is link http://imgur.com/a/zEooq

                    Comment

                    • deaddude429
                      Member
                      • Dec 2012
                      • 15
                      • USA
                      #6
                      Re: Emerson LC401EM3F will not turn on

                      at Multimeter i'm not exactly sure where the other stuff is

                        Comment

                        • selldoor
                          Slow Learner
                          • Dec 2010
                          • 7870
                          #7
                          Re: Emerson LC401EM3F will not turn on

                          There is no bridge rectifier either - its 4 of the diodes. Any diodes you have checked that you think are bad will need one leg lifted to test properly see here
                          https://www.badcaps.net/forum/showthread.php?t=10419 post 19- lost of tests.

                          Clean up the burn area with IPA and make a really good job of resoldering the link its carrying 340+volts

                          Your pictures are too big to load all at once max is 3mb per go so you may have a few goes with
                          2 at a time (or reduce the size)

                          Varistor should not be open -how many ohms? set may work without it but will need replacing
                          at some point.
                          Last edited by selldoor; 08-17-2014, 01:11 PM.
                          Please upload pictures using attachment function when ask for help on the repair
                          http://www.badcaps.net/forum/showthread.php?t=39740

                            Comment

                            Previous template Next

                            Related Topics

                            Collapse
                            • pajdek
                              Lenovo Y700-17ISK turn on and off
                              by pajdek
                              Hello, i have some issues with my laptop Lenovo Y700-17ISK (motherboard BY511 NM-A541), it started when i turn on the laptop, but the lcd wont turn on, i then connected it via hdmi to tv and screen was ok. So i thought maybe lcd stripe is faulty, i removed the bottom cover, disconnected main battery, reset the cmos by disconnecting battery for 1 min, then slighty move the lcd stripe. Conncted power supply and tuned on my laptop, the lcd turn on, it started to load os, then it turn off, after a second it turn on, then after like 3 seconds turn off again, and so on. Removed power supply, waited...
                              09-20-2023, 02:49 AM
                            • RdeveLabs
                              MSI GF63 THIN 11UCX (MS-16R6) LAPTOP WON'T TURN ON AFTER RESTARTING
                              by RdeveLabs
                              To all the members here...

                              Let me tell you a little bit about what happened to my laptop (MSI GF63 THIN 11UCX model: MS-16R6) that “maybe” you know how to solve this problem.

                              So before this problem happened, my laptop was running smoothly. When I wanted to restart my laptop, it looked fine at first. But after I waited for this restart process to take a long time, until finally I panicked (because the restart process did not finish plus the laptop screen only showed a black screen), I immediately pressed and held the power button to force the laptop to turn off. But...
                              05-05-2025, 04:59 AM
                            • robante15
                              Acer Aspire 4520 won't turn on after reboot
                              by robante15
                              Hello, I have an Acer Aspire 4520 from a couple of decades ago and I want to repair it solely for nostalgia.

                              It happens that when I turn it on after having been disconnected for a long time, it turns on without problems, it tells me that the BIOS has been reset and that it will load the factory settings, if I tell it to continue, the computer turns on and everything works fine.

                              The moment I turn it off and want to turn it back on a second time, or restart it and try to start it again, it no longer gives an image, and it no longer responds.

                              If I remove the...
                              04-06-2024, 06:50 PM
                            • masoksian
                              Dell latitude e7470 not turn on .power buton on off and Run Power problem
                              by masoksian
                              Hi everyone,

                              I am dealing with the problem of turning on and off my Dell e7470 notebook.

                              The battery charge light is solid white, I press the button, the power indicator and the light on the button are solid for 1-2 seconds and immediately turn off.

                              The system does not turn on, there is no post.

                              I removed the RAMs and changed them, changed the battery, RTC battery, AC adapter, removed them and waited, tried again, it does not turn on.
                              The problem continues in the same way.
                              I tried to turn on the Fn key, nothing came to the screen....
                              02-15-2025, 12:08 PM
                            • dqtech
                              lenovo x240 nm-a091 wont turn on
                              by dqtech
                              i got this laptop with no power issue....i flashed the bios and laptop can turn on and use normally....but when i shut it down and rest for few minute (2-3 minutes), it wont turn on....i have to flash bios again...any idea what is the problem?...when i shutdown and suddenly press power button to turn on, it will turn on normally....problem happen when i rest the laptop 2-3 minutes after shutdown, it will not turn on....i need to flash bios again
                              board number VIUX1 NM-A091 REV:1.0...
                              02-07-2024, 01:57 AM
                            • Loading...
                            • No more items.
                            Working...