Lenovo E10-30 bm5387 LCD connector and the power issues

[Zilicon]

Hi everyone,

I need to know the value of the resistor at pin 1 area of the LCD connector and the power switch circuit.

The PC turns on and off when the switch is connected but it works normally after the switch was removed after it turned on.

The switch part does not read to the ground and 3.3V wasn't present at the switch side.

thanks

[mon2]

Re: Needed schematic Lenovo bm5387 rev 1.2

See attached. Is this your board layout? If there is an interest, can post the boardview file for this board.

[Zilicon]

Re: Needed schematic Lenovo bm5387 rev 1.2

See attached. Is this your board layout? If there is an interest, can post the boardview file for this board.

thanks a lot. sadly the board layout is somewhat different.
please post them, perhaps the knowledge of the circuit can help me to understand this.

[mon2]

Re: Needed schematic Lenovo bm5387 rev 1.2

Post a clear picture of this area of your logic board. Will dig up the bv file I have that may be close.

[Zilicon]

Re: Needed schematic Lenovo bm5387 rev 1.2

Post a clear picture of this area of your logic board. Will dig up the bv file I have that may be close.

attached 1 is the connector part for the screen
attached 2 and 3 are the full view of the mobo

[mon2]

Re: Needed schematic Lenovo bm5387 rev 1.2

Flux and clean up C190. Almost looks to be shorted.