lenovo ideapad Z500 low B+ voltage

[ktmmotocross]

Hello
have this lenovo ideapad Z500 that have 1V on main 19V power rail

i attach pisture with voltages

[ktmmotocross]

Re: lenovo ideapad Z500 low B+ voltage

i checked pr307 and have correct value

[dellxps15]

Re: lenovo ideapad Z500 low B+ voltage

voltage on pr302? voltage on pr302 if u remove it ?

[ktmmotocross]

Re: lenovo ideapad Z500 low B+ voltage

if i jump second mosfet notebook works ok. it is P channel so why it dont switch when pq304 is off and pq307 is on

[dellxps15]

Re: lenovo ideapad Z500 low B+ voltage

voltage pr302 ?

if 0 volt check pr303 that is 200k.

[ktmmotocross]

Re: lenovo ideapad Z500 low B+ voltage

checked, its value is correct

[alihomee]

Re: lenovo ideapad Z500 low B+ voltage

normally battery controller ic responsible for opening gate of that main mosfet........try change it or simply make jumper on main rail

[Djosla]

Re: lenovo ideapad Z500 low B+ voltage

can you recheck measurements....? try without pc302 and try replacing second mosfet...

[ktmmotocross]

Re: lenovo ideapad Z500 low B+ voltage

replaced, checked still the same

[PANKAJAAMERIA1991]

Re: lenovo ideapad Z500 low B+ voltage

Lenovo z500 la-9063p need bios urgent plzzzzzz

[angelona31]

Re: lenovo ideapad Z500 low B+ voltage

anyone who had Lenovo ideapad z500 bin file? TIA

[teokarafou]

Re: lenovo ideapad Z500 low B+ voltage

replaced, checked still the same

hello my friend,i have the same problem
did you find out what was the problem??

[mielta]

Re: lenovo ideapad Z500 low B+ voltage

Hi
Try an Biosreset

[tomodachi]

Re: lenovo ideapad Z500 low B+ voltage

Hello
have this lenovo ideapad Z500 that have 1V on main 19V power rail

i attach pisture with voltages

Something is choking B+ line, that could be a filter or an ic, only quick way is you can directly inject +20v to B+ line with your power supply, use the big +B coil somewhere close to CPU, then see if there is something heating up

[tomodachi]

Re: lenovo ideapad Z500 low B+ voltage

hello my friend,i have the same problem
did you find out what was the problem??

You can also try this method above neighbour