I have replaced inverter, ldc, and even used a screen from another working P300, still no backlight.
What it can be the problem guys ?
What it can be the problem guys ?
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Re: Toshiba P300 Backlight Not Working
Check the fuse near lvds port on mobo which supply vin voltage for inverter. Most probably that is damaged. Replace that or short that. hope it will be solved.
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Re: Toshiba P300 Backlight Not Working
This is an old Lap, and not a LED LCD.
Anyway, here 2 photos near the lvds connector (top and bottom), i can't see any fuse.Attached FilesComment
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Re: Toshiba P300 Backlight Not Working
Put laptop on charger ,turn it on and measure pins 1,2,7 on lvds conector...write here...
Also check resistor r423 and inductor L28 (should be 0 ohm resistance )...
Asumming that the board is quanta bl5m...Last edited by Djosla; 08-03-2016, 01:29 PM.Comment
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Hello guys!
My Finlux TV backlight stopped working. I disassembled the TV, saw I don't have the tools to replace the backlight and assembled it again without replacing anything. So then the backlight started working again.
A day after it is also not working.
I decided now to remove the back cover and get the output voltage to the backlight. I placed the TV facedown and connected to the mains, so - nothing. I disconected, removed the cover and connected again to the mains and then the backlight lighted again. So strange.
Output voltage when light is 66V.
Board: VESTEL... -
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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... -
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