Lenovo B50-30

[JohnPaul]

Hi guys motherboard took heat after dog chewed the power cable I replaced one fried component, can anyone tello me the next step? Im getting 20volts on the board side of the DC-In jack, that's the extent of my testing

[ktmmotocross]

Re: Lenovo B50-30

u didnot mark component but it is two mosfets that activate VIN main power. u must find 19V after second mosfet or u have problem :-)

[String2016]

Re: Lenovo B50-30

trace first the 19v rail on the first two mosfet

[JohnPaul]

Re: Lenovo B50-30

if the first photo was rotated 90 degrees anti-clockwise (as i should have done ) Im getting 0 volts on the right side of the mosfet P0302. This was the mosfet that was badly burnt, I replaced it using a mosfet from a donor lenovo board but Im still getting 0 volts. Do they have to be 100% the same or will a similar one do the job?

[Elsid79]

Re: Lenovo B50-30

https://cdn.badcaps-static.com/pdfs/...308ad2141c.pdf

[Elsid79]

Re: Lenovo B50-30

check BQ24727

[ktmmotocross]

Re: Lenovo B50-30

vhat voltage do u have on base of second mosfet?

[JohnPaul]

Re: Lenovo B50-30

thanks for the info guys, I'll get back onto it soon and report back