Toshiba 47l6200u logo stays and backlights stays on.seems to be issue on main board.Cant access the main menu either.
-
-
Re: toshiba47l6200u logo stays indefinately and backlight stays on.
unplug the tv, freeze the eeprom with a can of air upside down, plug the tv in and turn it on. See what happens. -
Re: toshiba47l6200u logo stays indefinately and backlight stays on.
A couple of repair services for the main board on ebay if you search the main board part number or model number. Fixes for stuck on logo issue. Also a seller of the NAND Flash U3.
https://ebay.us/34UinI
https://ebay.us/VpgNhMComment
-
Re: toshiba47l6200u logo stays indefinately and backlight stays on.
Thanks for reply ...awesome forumComment
-
this tv is throwing me for a loop. do samsung tvs no longer have the backlight self test feature built into the power supply?
i tested the backlight with my LED tester and it lights up both strips. one of them reads 100v and the other reads 63.7v.
unplugged mainboard from power supply but left backlight plugged in, and then plugged psu wall power in. expected to see backlights light up but see nothing.
according to how ive diagnosed in the past, this would almost always be a bad power supply. replacement power supply was cheap like 20$ from ebay. but still i get not even... -
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... -
Hi.
picked up another TV. This time is a Vizio M65-C1. TV does not turn on. I had repaired another 60 inch vizio , Bad main board.
When power button is pressed, the Power led indicator on the bottom right, turns for a few seconds and then it fades away. No backlight or Vizio logo on screen. Removed back cover and repeated test.
This is the TV This TV is a little different from the Samsung I have worked on. Power supply is on the Left side, Main Bd is on the right side, T-CON , not in the picture is on the bottom. I am assuming that the boards in the middle are the LED... -
Currently trying to save a 65” 850D that definitely has a main board issue. Power supply has standby voltage and PS ON pin shows 3.5VDC but main has no signs of life…..no light under Sony logo and no optical port lit up. 12VDC is created by main board but no input triggers from main = no TCON 12V and no BL ON voltage present. I know about the trick of pulling the main to trigger the test pattern from the TCON but I get no backlight. If I jumper the 3.5VDC to TCON ON and BL ON, I can shine a light on the panel and see solid green, red, blue and white cycling. The 4 + backlight pins on the power... -
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...
Comment