Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic...

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...

Problem

This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached....

I have this laptop: charging light is on when connected to the charger, when I push the power button you can hear the fans spinning for a three seconds, the keyboard backlight it turning on, the caps lock key is unresponsive, no image on screen. Only a couple of times it booted with image for a few seconds and then reboots to black screen. When it is frozen with black screen and lit keyboard, I can keep pressed the power button to shut it completely.
I downloaded schematics in this forum ( https://www.badcaps.net/forum/troubl...y/troubleshoot...

Good morning.
I have a problem with my LG Smart 43UF640V TV. It starts, the backlight comes on but nothing is displayed on the screen and there is no sound.
I thought it was a TCon problem and ran various tests. If I disconnect one or the other of the cables from the tcon to the panel then the screen is white on the side where the cable is disconnected and black on the other side. If the two cables are disconnected the screen is completely black.
In the 4 configurations I measure exactly the same voltages on the tcon card (model V15 43UHD TM120 Ver0.4) :

HVDD : 7,28...