IndiaReFix - Laptop & TV Repair Forum

Motherboard - la-4101p
Problem - Laptop shows plugged in charging but battery voltage not increasing it remains same
I have changed battery,charging ic bq24740,mosfets of charging section,programmed bios no success please help !!
Here are the measurements of charging ic
On battery
CHGEN 0
ACN 19.6
ACP 19.6
ACDET 2.2
ACSET 1.2
IADSLP 0
VREF 3.3
VADC 3.3
VADJ 1.4
IADAPT 0
SRSET 1.4
BAT 10.9
SRN 10.9
SRP 10.9
CELLS 1.07
LODRV 0
REGN 5.9
PH 10.9
HIDRV 10.9
BTST 15.6
PVCC 19.6

On Adapter
CHGEN 3.3
ACN 19.6
ACP 19.6
ACDET 0
ACSET 1.2
IADSLP 0
VREF 0
VADC 3.3
VADJ 1.4
IADAPT 0
SRSET 0
BAT 0
SRN 0
SRP 0
CELLS 0
LODRV 0
REGN 0
PH 0
HIDRV 0
BTST 0
PVCC 19.6

acdet should according to the charging chip plz ensure and check

Sir i could'nd get

Please explain a bit more

have you checked PR137 & PR138 resistance value. These voltage dividor resistors feed ACDET pin & u will get around 2.75v on ACDET pin according to the board schematic.

Volt in p chanel mosfet foulty

Changed the mosfets 3 pchannel , 2 n channel !! No success

sir frist change io charging coil ...