my dell m4600 power off when unplugged

maumtech

Prominent
Dec 1, 2017
2
0
510
my dell m4600 power off when unplugged.
I bought a new battery, it is charging properly but still the power goes off when unplugged.
I tried the following:
1. uninstall/install battery driver
2. upgrade BIOS
3. unplug CMOS battery and plug after 6 hours later.
Nothing worked.
Any help?
 

maumtech

Prominent
Dec 1, 2017
2
0
510


Thanks a lot.
I know how to solder. How do I identify faulty MOSFET?
Is there only one MOSFET on the motherboard?
If I identify the faulty one, where can I buy replacement MOSFET?
Thanks again.