Vestel 17ips12 backlight on

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  • robgerr
    Asus N580VN no backlight lcd. Main X580VN rev 3.0
    by robgerr
    Good morning forum. , This notebook has problems with the backlight being absent. If I shine a flashlight on the screen, i can see the image. I tried to change several LCDs but the same problem. When I disassembled it, I noticed the LVDS connector was a little burned in the backlight pins. I also found oxide in the LVDS connector on the motherboard. I replaced the LVDS cable, same defect. I replaced the LVDS connector on the motherboard, same problem. I took some measurements on the pins (I used the boardview of the X580VD).

    pin 36,37,38,39 19,40v
    pin 35 no connected
    pin...
    07-23-2024, 05:04 AM
  • Awsmessymail
    Vizio E701i-A3 backlight only and now no backlight
    by Awsmessymail
    Hello all,
    I’ve tried to repair TVs in the past with some luck. Toms repair manuals got taken down and now thats a bit harder.
    I picked this TV up hoping for a quick fix. When the TV would power on, only the backlights would come on. The owner told me they heard loud screeching before it shut off. This alone makes me want to think the main board has an issue.
    As I researched, I found the TCON/driver boards were an issue on this unit. I went in troubleshooting the TCON but found good voltages on the TCON. I followed shop jimmys guide to test the transistors and they seem okay....
    02-13-2024, 11:04 PM
  • max789
    Samsung UE48H6410 replaced Mainboard but backlights doesnt go on
    by max789
    Hello, I have a problem with my Samsung UE48H6410SSXZG with the main board BN41-02156A and the power board BN44-00709A. Everything seemed like this, the TV could no longer be switched on, the standby LED always flashed 5x2 times. Backlight was off and no sound from TV. Also made the flashlight test and there was no picture.

    I made the following tests:
    1. Disconnected the main board from Power Board = backlight works.
    2. Connected the main board and disconnected the T-Con = backlights does not work.

    So I ordered a main board from Ebay also BN41-02156A but from...
    01-18-2024, 06:56 AM
  • DanPoka
    Guide me through repairing a Dell p2210f LCD ccfl backlight monitor
    by DanPoka
    I bought this p2210f dell monitor to fix. Schematic is the same as p2210.
    Behaviour is that monitors comes on but then backlight switches off almost instantly. If I look with flashlight I can still find the "No signal message". So definitely a backlight issue. Trying to advance the issue I proved that the protection circuit is switching off the backlight by shorting out C3 and resistor to disable the INL chip then re enable by removing the short.
    This is where it gets interesting. When I disassembled the monitor to solder leads on c3 capacitor I noticed the backlight flickered...
    02-15-2025, 05:05 AM
  • Comp_Pro
    No Backlight Macbook A1990 820-01041
    by Comp_Pro
    Hello all,

    Am trying to figure out this backlight issue with this A1990 Macbook Pro.

    Tests performed:

    There is no backlight even with a good screen.
    Backlight IC is receiving the correct support voltages.
    Fuse F8400 ok
    Current sense resistor R8400 ok
    Backlight IC is receiving 3.3V on enable pin.
    Backlight IC receiving voltage from PPBUS_G3H, aprox 12.5V.
    Backlight IC receiving 5V from PP5V_G3S
    Backlight IC BKLT_SCL and BKLT_SDA both measure 0.545V diode mode to ground
    I2C_BKLT_SCL and I2C_BKLT_SDA both measure...
    05-06-2024, 10:23 PM
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