Hello, I have a packard bell laptop (year 2009, SNID : 91101474149). When i push power button, bios emits two short beeps. I've no display on the screen (it's off), the DVD player seems to work because i feel he is trying to boot a cd ... I try a clear cmos by removing the cmos battery all-night, remove RAM, remove wifi card, HDD, but no success ... I have the same result : 2 beeps ... It seems my motherboard has no cmos jumpers. Sorry for my english Thanks for your help.