sadly, it seems there is no obvious short between the data lines and other lines. upon visual inspection, it also seems that there are no bent pins anywhere on the connectors / cable. does anyone else have any ideas?

thanks, i'll inspect the connectors in more detail tomorrow. I'm also going to try checking if any of the twisted pair data lines are shorted to any other lines on the LCD connector since it is still my main suspect.

Ive heard hissing sounds from bad components before, specifically I once saw a board that had soldered-on RAM and one of the RAM chips was hissing impressively loudly and getting incredibly hot. Covering it with IPA revealed a hot spot in a corner of the chip which I figured just meant the chip was dead. If a mosfet is hissing I can't imagine it can be healthy

yep, i just checked and its working fine



I tried another eDP display, larger than the original but same 30pin connector, and I don't get an image nor a backlight either. I do get 3.0V on LCD_VCC with the other LCD tho, where I had 2.25V with the original. In terms of resistances I get the following values: ...

No, I do get BL_PWR at 19V so that's alright. Backlight voltage is there but BL_EN and BL_PWN are at 0V so theres no backlight. There is no image either so its not a no backlight but image present problem.

Hi everyone!

First post on here so do tell me if i'm doing anything wrong. I have a laptop that came in with a broken hinge, but a healthy LCD. We replaced the LCD rear cover and now we do not get an image on the LCD anymore, though we get one via HDMI. There is sadly no schematic or boardview available for this motherboard (Bucks U42 DIS 17817-1) as far as i can tell, but I was able to identify which of the important pins on the LCD eDP connector (30 pin 2 lane) correspond to which pins on the motherboard display connector (which is 40pin, 30 for LCD and 10 for camera/face rec etc)...

Hi,

my name is alice and i am a hobbyist computer toucher and i work in tech support, including basic repairs. I love that there are still forums like badcaps on the web. Hope to be able to learn more about fixing devices cuz i hate e-waste!

see you around!