Hi, I have this Lenovo V510z AIO with the mobo CSA20 LA-D953P with no backlight at all, I've tried checking on different websites for schematics or anything leading to the location of the backlight circuit with no luck, there's nothing that seems to be burned out nor shorted is there any way to troubleshoot this issue? thank you in advance
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Hello!
I have a couple of T440p that need backlight fuse, image is present but no light. Can someone please point them so i can replace them?
Thank you!
Schematics: https://www.badcaps.net/forum/troubl...42#post147114208-26-2024, 02:36 PM -
Good morning guys,
I have a Lenovo V15 G3 that came in with liquid damage. The damage was very minor and some corrosion on the IO board where the power switch was. After cleaning both the motherboard and IO board in alcohol, the laptop turned on and I had backlight for about 3 seconds but nothing further. I don't have a boardview for this laptop (Have requested this in the Schematic Request section), however from previous experience on Lenovo laptops I have checked pins 1, 2, 3 on the EDP connector. When the battery is connected only, I get 8V and when AC adapter is connected, I get... -
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... -
I've got a Lenovo V14-ADA laptop with no backlight. I have changed the whole screen assembly from a known working one in our Spares and Repairs tub but to no avail as there is still no backlight on the screen.
Using a DMM I have tried to find the 20V power rail (it's a Lenovo so they tend to use 20V rather than the more normal 19V) on the screen connector but on pins 1 & 2 I'm getting 0V.
I have tested the continuity of the fuse (F2) and it is open circuit.
Is there anything I should be testing a this point or is it just... -
I upgraded display from HD to UHD recently, and I think I did everything right, battery was disabled in BIOS, and removed, yet the screen has no backlight. Both the old and new display behave the same way. I checked the motherboard and I see the fv1 fuse, and a fv2 spot for a fuse, but it's missing. Does anyone have any information on whether fv2 is responsible for backlight, or why it's missing? There's a schematic posted somewhere on this forum, but I can't view it as I don't have the hardware right now, since the laptop screen is broken and I run Linux.
Also from further search...