|Well at this point I would say you fried something or broke a trace somewhere on the motherboard. If you've never worked on a circuit board or done troubleshooting on one, I would suspect you don't have the tools to troubleshoot either such as a voltmeter, oscilliscope, etc. Nor do you have the schematics of the motherboard that will tell you what voltages are supposed to be present at what points. |
I would do two things at this point. Stop listening to your idiot friend, then take your laptop to a shop and have the motherboard replaced by a qualified technician.