Lenovo S531 - LA-9671P burned KB9012

[Grishnackh]

Hello Guys,

i got a faulty Lenovo S531 with a burned KB9012. I changed the KB9012, flashed the right Bios/EC File on it but he want turn on. I also changed the DC Board. When i press the power button, the fan starts to spin for 1 sec and then stops, also the keyboard light flashes on but immediately turns off. I couldnt find any schematic for this board. Does anyone have some information where i could begin to solve this problem? Or does somebody know from other Lenovo Boards what it could be? This Board has fixed soldered CPU and RAM, maybe my start problem could be a sign for a faulty CPU / RAM?

Greets, Grishnackh

[highpulse]

Re: Lenovo S531 - LA-9671P burned KB9012

im sorry , but exactly how did you flash the KB9012 ???

[Grishnackh]

Re: Lenovo S531 - LA-9671P burned KB9012

I flashed it with a RT809F, which is able to flash the KB9012 over the Keyboard Connector. Only the EC File, its a 128kb Part from the Bios File. I flashed the BIOS IC (Winbond) too, but still not running.

[Grishnackh]

Re: Lenovo S531 - LA-9671P burned KB9012

Does nobody has any information or suggestions about this problem?

[ridamouh159]

Re: Lenovo S531 - LA-9671P burned KB9012

is there 3.3v and 5.10v ?

[Grishnackh]

Re: Lenovo S531 - LA-9671P burned KB9012

Yes, there is 3.3v on KB9012, but not 5.10v....where should i have the 5.10v?

I have everywhere 3.3v, also on AVCC (PIN 67) where i should have 1.8v or am I being wrong?

Greets Grishnackh