Lenovo IdeaPad 100 board is dead

[Techtiger]

Re: Lenovo IdeaPad 100 board is dead

Did you repair the MB

[coolerman]

Re: Lenovo IdeaPad 100 board is dead

Did you repair the MB

no yet
can help;

[crozoki]

Re: Lenovo IdeaPad 100 board is dead

Hello
Same motherboard here. when connect motherboard to original charger,on jack say that is 0.5V. but when conect to bench psu, motherboard immediately has volatage drop on psu and ampere is rising.
find out that PQ302 on shematic had short. then i remove mosfet from motherboard. now voltage on psu is steady and ampere is 0. solder another mosfet and problem came back. now i stuck.
Do you have any advice?

[mcplslg123]

Re: Lenovo IdeaPad 100 board is dead

@crozoki, you have short in B+ Line. Remove the mosfet again and measure resistance on drain(pin5-6-7-8) of mosfet.

[rbvndonh]

Re: Lenovo IdeaPad 100 board is dead

For so low resstance on PJ304 (near PU200) - check resistance of UA1 pin 24 to ground. If 5 ohm, then cut 24V line (make a jumper with a scalpel). If laptop diode will start or laptop will work, then replace UA1.

[Stevedb]

Re: Lenovo IdeaPad 100 board is dead

You need to measure if yy
Ou have a short on that pin then