Viewsonic - VA1912w-3

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Notherbast
    Member
    • Mar 2009
    • 10
    #1

    Viewsonic - VA1912w-3

    I dont know how i seem to have gotten conned into fixing all these LCD @ the moment but anyway...

    Still waiting for parts on the Benq, but heres another one..

    Viewsonic, nothing but a white screen. had 2 of them, 1 with dud caps, and the other one a white screen. .Swapped the white screen PSU into the other and its all good. So, it looks like the video board is having trouble. All SMD(on the video board), so no bulging or anything. Connectors are good, all clean, no bad joints, reseated cables but no joy.

    Any ideas? been over with the glass looking for dry joints, found a couple and no joy, anyone know test points or anything which may help diagnosis ?

    Oh, its a rebadged chimei a190a2-h01

    Cheers,
    David.
    Last edited by Notherbast; 03-18-2009, 05:48 PM.
    My sludgebox:

    Intel Xeon E3110
    ASUS P5E
    CoolerMaster CM690
    CoolerMaster Extreme 650 PSU
    4GB Mushkin DDR2-800
    2 x Samsung 750GB HDD
    2 x WD 400GB HDD
    Everything else varies depending on the week
    Tags: None
    • mladen82
      Member
      • Mar 2009
      • 39
      • Montenegro
      #2
      Re: Viewsonic - VA1912w-3

      probably don't have power supply to the lcd panel, you must check +5V to panel electronics (smd fuse)

        Comment

        • PCBONEZ
          Grumpy Old Fart
          • Aug 2005
          • 10661
          • USA
          #3
          Re: Viewsonic - VA1912w-3

          Viewsonics usually go due to PSU caps.
          Mann-Made Global Warming.
          - We should be more concerned about the Intellectual Climate.
          -
          Be who you are and say what you feel, because those who mind don't matter and those who matter don't mind.
          - Dr Seuss
          -
          You can teach a man to fish and feed him for life, but if he can't handle sushi you must also teach him to cook.
          -

            Comment

            • EGuevarae
              Badcaps Legend
              • Nov 2008
              • 1336
              • USA
              #4
              Re: Viewsonic - VA1912w-3

              Originally posted by mladen82
              probably don't have power supply to the lcd panel, you must check +5V to panel electronics (smd fuse)
              Second that. White screen can be caused by an open fuse on the input of the LCD panel electronics.
              There are 10 kind of people in this world: those that understand binary, and those who don't.
              • ASUS ROG Maximus IX Code
              • Intel Core i5-7600K 3.8GHz
              • 16gb GSKILL TridentZ RGB DDR4-3200
              • 1 M2 SSD + 2 WD Blue 1TB (Mirrored)
              • Windows 10 Pro x64
              • GeForce GT1050
                2 x Acer KA240H + 1 Vewsonic VP2130 21 (a cap replacement job )

                Comment

                • Notherbast
                  Member
                  • Mar 2009
                  • 10
                  #5
                  Re: Viewsonic - VA1912w-3

                  PSU is good, as it works perfectly for 3 days now in another monitor... checked all smd fuses, all good...

                  Guess a little more time with the meter is called for.

                  Cheers.
                  My sludgebox:

                  Intel Xeon E3110
                  ASUS P5E
                  CoolerMaster CM690
                  CoolerMaster Extreme 650 PSU
                  4GB Mushkin DDR2-800
                  2 x Samsung 750GB HDD
                  2 x WD 400GB HDD
                  Everything else varies depending on the week

                    Comment

                    • EGuevarae
                      Badcaps Legend
                      • Nov 2008
                      • 1336
                      • USA
                      #6
                      Re: Viewsonic - VA1912w-3

                      Originally posted by Notherbast
                      PSU is good, as it works perfectly for 3 days now in another monitor... checked all smd fuses, all good...

                      Guess a little more time with the meter is called for.

                      Cheers.
                      Check the fuse on the LCD panel electronics. If open, screen will be white. I've seen it on Hanns-G and Dell units.
                      There are 10 kind of people in this world: those that understand binary, and those who don't.
                      • ASUS ROG Maximus IX Code
                      • Intel Core i5-7600K 3.8GHz
                      • 16gb GSKILL TridentZ RGB DDR4-3200
                      • 1 M2 SSD + 2 WD Blue 1TB (Mirrored)
                      • Windows 10 Pro x64
                      • GeForce GT1050
                        2 x Acer KA240H + 1 Vewsonic VP2130 21 (a cap replacement job )

                        Comment

                        Previous template Next

                        Related Topics

                        Collapse
                        • harp
                          White screen repairs
                          by harp
                          To ask here... I have few devices with white screen problem, actualy nokia 2220 and some fuji? camera, and try to understand what is common problem to cause that issue.
                          Yes, both devices work everything else probably ok, I mean, I hear intro melody and keypress click sound, DTMF tone, power on off... all ok.
                          On desk is nokia 2220 slide, and I check all screen connectors and components arround it, measure voltage drop, but all looks ok. I suspect on slide flex cable, but it look ok and white screen is not interupt while flexing board, pushing conectors, and sliding up down. In attachment...
                          05-13-2024, 03:43 AM
                        • domu
                          Viewsonic VS16217 strange problem - white flickering screen on power up
                          by domu
                          As per subject, on power up display shows no image, but white
                          flickering screen. Strangely, it only happen after power was lost
                          when it was on. After power returns - white screen only, but if
                          disconnect power for 12-24 hrs, and connect then again monitor
                          works normally.

                          Any clues how to go about it would be greatly appreciated.
                          07-18-2023, 04:57 AM
                        • Ryan.man
                          Macbook 2017 with touchbar (A1706) won't turn on after removing the screen
                          by Ryan.man
                          Hello everybody! Posting this in hopes somebody has some expertise that leads to a clear path of troubleshooting that saves me a lot of time!

                          My macbook has the flex cable problem, the one that prevents the screen turning on. Ive been dealing with this for the last 3 years. Last year it went dead and I managed to fix it following youtube tutorials. But my fix wasnt the best, the problem returned a month later. This week, it went dead again. I again tried to fix it.

                          This time the original cable broke too close to the screen, it can't be fixed without tearing the screen...
                          02-04-2025, 12:23 PM
                        • EazyBone
                          Sharp LC-65Q620U White Screen
                          by EazyBone
                          Another TV topic!!
                          I got this sharp TV that when I first plugged it in it showed the sharp logo and then went to the input screen. This was about 30 seconds and then it showed white screen. Now I can't see anything but white screen. This has a separate TCON and Main.

                          The TCON is getting 12V and several parts are as well but the VGH line is only .5Volts which I thought is totally incorrect.

                          Am I on the correct assumption that the TCON is bad somehow if I'm only getting that voltage or is there something else I should check?...
                          08-21-2024, 12:56 PM
                        • hcinne
                          Dell G15 ryzen edition black screen 2 amber 1 white
                          by hcinne
                          Hello,
                          I have a Dell G15 ryzen edition (ryzen 5) that turns on but won't post, black screen, keyboard lights on, caps lock led on, fans turns and the battery indicating light is showing 2amber and 1 white according to dell website it's a cpu failure, but i tried few basic things before i open it up i tested the screen by pressing the d button before powering it up but it didn't show anything i tried the ctrl+esc for bios recovery but still black screen i tried refreshing the screen, i plugged it on an external monitor but same thing. Next step i unplugged the battery and kept pressing the...
                          07-23-2024, 07:56 AM
                        • Loading...
                        • No more items.
                        Working...