It's worth a try, if that person is a computer engineer. I thought about getting in to that field (even took some classes). It is HARD. You need to understand Digital Logic, electronic basics, etc., etc.
But if he makes an error, than you can expect a big headache coming on. If it was me, no way in hell am I tampering with my motherboard.
yea i wouldnt even bother its going to be money you could spend on a new motherboard, which your probably going to need unless this guy is crazy accurate