原帖由： moyiize ,
@antibiotic1000 Hi That shorting trick worked for me... A real miracle after I got desperate to power on my X550C laptop. So does it mean that the ribbon is bad or the button board? Also it seems that I have to do it every time or with power adapter will the button switch on the laptop? I did this with only battery because I left the power adapter at work. Thanks for your useful tip!