Anyone can help me with a schematic?
Thank you
Thank you
Attached Files
-
Hello,
YouTube video of the problem encountered: https://youtube.com/shorts/q7TLNv36LUo
I am a pro and I have a problem that I have never seen despite my 7.5 years of experience on my own and my thousands of repairs, on a customer's Dell G3 15 3500.
On this PC I have already changed the complete palmrest because the keyboard was no longer working properly.
I also changed the screen because the PC fell and the screen was broken.
I changed the battery with a new and original battery.
I also had corrosion/oxidation on the... -
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... -
Hi all,
So im a technician but new to component level repairs on motherboards etc.
My laptop wont turn on the screen backlight - i tried a new screen already.
Ive opened the schematics and found QV1 which gives 3.5 v on all pins except pin 4 which gives 8v.
bridging pin 4 and 5 switches the backlight on, im assuming as its then putting 8v through to pin 5.
I really dont know where to go from here to diagnose the faulty component. Any tips would be greatly appreciated as im trying to learn so it would be great to get this working again....10-15-2025, 04:25 PM -
hellolaptop dell 3521 la-9104p no light on screen
i can see data ok but no backlight
on jlvds
NV_PWR_SRC 18 v is ok
3vs is ok 3.3
lcdvdd is ok 3.3
i replacd led screen
and change flata ( caple between board and led )
any idea... -
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...
Comment