Hello, Seng Lee. So you want to go from a novice to electronics engineer with at least a Bachelors Degree. Well what ever you do; do "NOT" go poking around your motherboard with a multimeter,or you will probably be replacing it. I went to DeVry in Atlanta for a B.S. in electronics engineering, but I did not graduate, no MONEY. You have a long way to go before you can trouble shoot to component level; but don't get discouraged it's not that hard really, it just takes desire and persistence. there is a lot of math. Actually electronics is all math and abstract concepts. Go on Amazon.com and look up "TAB ELECTRONICS" guide to understanding electricity and electronics. Author: G. RANDY SLONE. ISBN 0-07-136057-3. The book might look abit lame in it's technical depth, but it will get you a strong overall " basic" understanding in electronics theory (circuits) and math. Also purchase Schaum's outlines "BASIC ELECTRICiTY" it concentrates on the mathematics of electricity. Also Google "ARRL" American Radio Relay League. Their electronics technician qualifications are the very one's DeVry teaches. You can get last years ARRL handbook for about $20.00, excellent book for radio schematics and has a tutorial on electronics, BUT, if the book is anything like they used to be you better be pretty good with mathematics. That should help point you in the right direction. Also Google "electronics tutorial". Also Wikipedia.