Dell E6540 starts with Jack, but not with Power Button

[mcplslg123]

Re: Dell E6540 starts with Jack, but not with Power Button

"coz of sio being in bga package here, pins are not exposed. So really cant diagonise deeper.Else there were lot of options to measure on sio pins.

[pingaroon]

Re: Dell E6540 starts with Jack, but not with Power Button

Thanks, MCP,

I may just remove the SIO again, since the board is useless as it is.

Would you still be willing to help?

[mcplslg123]

Re: Dell E6540 starts with Jack, but not with Power Button

The pins of SIO may not be marked on mb. Make this aspect sure. If pins are not marked, it will be preety useless. As far as help is concerned , the whole badcaps family is there to help you. Personally, i'll try to help with my limited knowledge.

[Spider1211]

Re: Dell E6540 starts with Jack, but not with Power Button

Try using a fresh new battery cell, some laptops are very picky.

[pingaroon]

Re: Dell E6540 starts with Jack, but not with Power Button

Hi, the bios battery was brand new, measuring 3.3v. I've abandoned this board as it's just beyond my level for now, but thank you all for your help

[new]

Re: Dell E6540 starts with Jack, but not with Power Button

clearly it is the cmos battery . I had the same issue on 3 dell of this exact model they all solved by replacing the same battery then updating the bios .. you chosen the wrong way and long run . you were advised to check the cmos battery earlier.

[mcplslg123]

Re: Dell E6540 starts with Jack, but not with Power Button

@new, read post#25 by OP. He has already replaced cmos cell and it was 3.3V.