Hello,
I have this laptop that is not charging at all.
Removing the MB I first noticed the PET film insulator at the back is thermal shrinked seemingly coming from the battery circuit and heavily distorted behind the 2nd DC-in mosfet Q25 (MDV3604).
The battery itself is drained to 0, with one cell being a little bulgy. I guess the battery died and the circuit tried to push amperes in it?
Anyway with a 19.5V adapter (not original) hooked I have 19V on drain of the 2nd DC-in mosfet.
I have a short to ground on inductor L9, TC17, TC16 and several caps around.
The cap pointed with a red arrow almost fell off when probed as the solder probably melted from the short (still the cap out of circuit is not shorted)
A small solder ball on the drain of PQ5 (MDV3604).
Charging Controller PU1 is BQ24780S
Now, I read the sticky for laptop battery charging circuit troubleshooting, but I would appreciate if there was a point out as to how to find the short. If I am to hook up a 1V, should I input it on the drain of PQ5? (right next to it there's a pad of cathode D45)
I have this laptop that is not charging at all.
Removing the MB I first noticed the PET film insulator at the back is thermal shrinked seemingly coming from the battery circuit and heavily distorted behind the 2nd DC-in mosfet Q25 (MDV3604).
The battery itself is drained to 0, with one cell being a little bulgy. I guess the battery died and the circuit tried to push amperes in it?
Anyway with a 19.5V adapter (not original) hooked I have 19V on drain of the 2nd DC-in mosfet.
I have a short to ground on inductor L9, TC17, TC16 and several caps around.
The cap pointed with a red arrow almost fell off when probed as the solder probably melted from the short (still the cap out of circuit is not shorted)
A small solder ball on the drain of PQ5 (MDV3604).
Charging Controller PU1 is BQ24780S
Now, I read the sticky for laptop battery charging circuit troubleshooting, but I would appreciate if there was a point out as to how to find the short. If I am to hook up a 1V, should I input it on the drain of PQ5? (right next to it there's a pad of cathode D45)
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