I have a dell inspiron 8100. I was having troubles with it starting. It would boot up and get a screen that said it could not locate a boot device. It would not find the cd rom drive or locate the hard drive. This is after an extended period of not working at all. Well I had the bright idea of taking it completely apart. So with my trusty manual in hand I completely gutted it down to the processor and motherboard being removed and dissassembled and I even disconnected the reserve battery. After putting it all back together twice. All that it will do is the lights for startup will light up for about 5 seconds then it dies it will not post, and the fans and harddrive aren't accessed. I have tried starting it up with the harddrive removed, just battery power, just ac, memory removed. Any thoughts. Please save me from myself. It had worked fine in the past.