Re: Lenovo I3X0MS Schematic needed

Thank you very much, you are very kind person.
I appreciate your help.

Re: Sony Vaio VPC-SB26FG cannot power on



Why do you think you would get anything more than 0.01V on these pads without battery connected and with KBC (keyboard controller) disconnected (it is located on the MAIN board, MBX-238, and rules the charging process)?

The points you measure voltages at are battery "+" and "-" terminals, and there has to be no voltage (or close to none) without battery.

The point we discuss in this thread is that there is a short cirquit on the MAIN board (MBX-238) that causes CNX-458 to SHUT OFF...

Re: Sony Vaio VPC-SB26FG cannot power on



Hi there!

The cap that is in the red box was faulty. But when I applied current to GREEN points, I did not know this yet.

The reason I applied current to these (GREEN) spots is that these are main GROUND and VIN (+) in points on this board. And when you apply current to the shorted cirquit, it starts to dissipate heat. The component that gets warm is most likely to be defective.

In my case it was the capacitor outline in red....

Re: Sony Vaio VPC-SB26FG cannot power on

Hi guys!
I have just registered to share a bit of my experience with this mobo.
I had no power at all on this laptop (current draw was 0.01A when connecting the power adapter to the laptop). BTW, I am using a very convenient chinese cheap power meter to see what happens to the laptops when I connect them: [url]http://www.ebay.com/itm/261219652805[/url] .

I had the black connectors (in yellow rectangles) on the mobo shorted with each other and to the ground. Therefore, the power daughter board MBX-458 did not provide...