Samsung LCD LE40R86 no picture

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • PowerAmpFreak
    Badcaps Veteran
    • Feb 2010
    • 982
    • Sweden
    #1

    Samsung LCD LE40R86 no picture

    Today I got two Samsung LCD tv's model LE40R86 with the standard cap problem. The first was a successful repair, but the second refuse to start up the screen. I even swapped powersupplies but that makes no difference.
    Both powersupplies works in the "OK" tv.
    It seems like when the TV tries to start up the inverter and lamp, the set goes into protect. What could be wrong, the lamp perhaps?
    Haven't done much in this area, so any advice is welcome!
    Last edited by PowerAmpFreak; 08-17-2010, 02:39 PM. Reason: grammatic refinement
    Tags: None
    • PlainBill
      Badcaps Legend
      • Feb 2009
      • 7034
      • USA
      #2
      Re: Samsung LCD LE40R86 no picture

      Originally posted by PowerAmpFreak
      Today I got two Samsung LCD tv's model LE40R86 with the standard cap problem. The first was a successful repair, but the second refuse to start up the screen. I even swapped powersupplies but that makes no difference.
      Both powersupplies works in the "OK" tv.
      It seems like when the TV tries to start up the inverter and lamp, the set goes into protect. What could be wrong, the lamp perhaps?
      Haven't done much in this area, so any advice is welcome!
      Well, you've established it isn't the power supply. Without pictures, the other possible candidates are the main board and POSSIBLY the inverter. Usually the inverter does not return a status signal to the main board, but it might possibly be overloading the power supply.

      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

        • PowerAmpFreak
          Badcaps Veteran
          • Feb 2010
          • 982
          • Sweden
          #3
          Re: Samsung LCD LE40R86 no picture

          There are a connector to the Inverter board, +12V and one of the other poles were marked "FB", could this be feedback perhaps?
          Maybe this is used as a status signal if the inverter operates?

            Comment

            • PowerAmpFreak
              Badcaps Veteran
              • Feb 2010
              • 982
              • Sweden
              #4
              Re: Samsung LCD LE40R86 no picture

              What a joke! Both Samsung's had capacitor problems in powersupplies.
              The first TV will not give any picture. Shuts itself off when inverter should start.
              The other TV both pic and sound works (halleluja).
              I swapped powersupplies - no help for the tv without picture
              I then swapped main boards, then the picture was there.
              I swapped back mainboards, back to the begining again.
              TV was put for final test, suddenly after one hour the TV shuts off.
              It now act exactly as the other, which refuse to give any picture.
              Exactly when the inverter is to start, it shuts off, tries again, shuts off, repeats
              Obviously BOTH main boards are bad,
              Even worse, they are no longer available to order. What a joke!

                Comment

                • vikingchow
                  Member
                  • Aug 2010
                  • 15
                  #5
                  Re: Samsung LCD LE40R86 no picture

                  What is the main/b's part number?

                  P.S.
                  It's good to have two identical item for checking error etc, saves lots of time.

                    Comment

                    • PowerAmpFreak
                      Badcaps Veteran
                      • Feb 2010
                      • 982
                      • Sweden
                      #6
                      Re: Samsung LCD LE40R86 no picture

                      Mainboards are: BN41-00813B MP1.0 Bordeaux plus

                        Comment

                        • PowerAmpFreak
                          Badcaps Veteran
                          • Feb 2010
                          • 982
                          • Sweden
                          #7
                          Re: Samsung LCD LE40R86 no picture

                          See attached picture. Chip in the middle of the picture gets hot when set is trying to startup. Another SSB replacement necessary perhaps?
                          Attached Files

                            Comment

                            • rajtech
                              New Member
                              • Dec 2011
                              • 2
                              #8
                              Re: Samsung LCD LE40R86 no picture

                              Hi, I have problem in my LE40R86, the DVB-T is not available, can some one help me please? I tried the service menu reset, but it did not work....

                                Comment

                                Previous template Next

                                Related Topics

                                Collapse
                                • Document Archive
                                  Samsung Galaxy Book 2 Notebook Specification for Upgrade or Repair
                                  by Document Archive
                                  This specification for the Samsung Galaxy Book 2 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Galaxy Book 2 boardview and Galaxy Book 2 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download...
                                  09-07-2024, 05:50 AM
                                • TR103
                                  Samsung TV model UE50TU: rebooting, backlight, sound, but no picture
                                  by TR103
                                  Hi, I have a Samsung UE50TU with:
                                  - sound and backlight, but no picture
                                  - when it arrived, it had a picture for a few seconds
                                  - it keeps rebooting
                                  - without ribbon cable between the two panel boards, it does not reboot but I have no picture
                                  - without cable between mainboard and lcd panel, it does not reboot (but obviously i have no picture)
                                  - when i try a tape fix, its keeps rebooting, unless I tape off pin 1 (the innermost pin). In that case it does not reboot but I have no picture.

                                  - without cable between mainboard and lcd panel and with a jumpered...
                                  01-22-2025, 04:12 PM
                                • JJAAMM
                                  SAMSUNG UN55KS9000F picture fades then distorts into vertical lines after 20 seconds
                                  by JJAAMM
                                  This was my main TV for the last 6 years. I'm not inclined to throw out a $2600 TV so quickly so I'm trying to investigate the issue.

                                  Problem
                                  TV was disconnected from power for 6 months during construction. When I plugged it yesterday picture was fine, after 30 seconds it dimmed then started developing horizontal lines, picture then starts to ghost vertically until it degrades into vertical streaks. TV always displays a perfect picture when cold. I can unplug TV for 5 minutes and plug it back in and picture is restored for 20 seconds. I can also keep it in standby mode...
                                  07-06-2023, 06:01 AM
                                • Mgiffune
                                  Samsung UN60EH6000F Black Screen, Backlight and Sound Good. Power Cycle Returns Picture
                                  by Mgiffune
                                  I have a 60 inch Samsung UN60EH6000F flatscreen TV. The screen went black a few months ago Sound is good, backlight is good, no menu. I replaced the TCon board with a used board purchased from Ebay. It worked fine for a 3-4 months, then the screen started ‘fading' back. Once again, sound is good, backlight is good, no menu. However, this time the picture looks fine for about 10-15 minutes, then fades back. If I power cycle the TV, the display reappears, for another 10-15 minutes, then fades black again. Repeatable ever time.

                                  I ordered a supposedly ‘new' Tcon board this time, and                                  ...
                                  06-09-2024, 10:28 AM
                                • Dodgethis
                                  Samsung QN75Q6DRA, No Picture, Has BL, and Sound
                                  by Dodgethis
                                  Hello all,

                                  This is my first post, but long term lurker on the form learning as much as possible about these TV's. I was given this TV as due to a power outage of constant On/off of power to TV. The TV originally would just click on and off (Typical Reboot Cycle). I opened the back of the TV, and troubleshooted by taking the 96 pin LVDS off one at a time to see if I had a picture on either side. I finally fixed the reboot cycle by finding the error on the left side of the screen off connector CN 1301, and the TV would stay on. Further troubleshooting led me to the driver boards where...
                                  5 Photos
                                  09-11-2024, 07:39 AM
                                • Loading...
                                • No more items.
                                Working...