+ 0 Votes What!!!??? Mehul Bhai 3 years ago What!!!??? + 0 Votes I would strongly suggest _Papa_ 3 years ago That without proper electronics training and *lots* of troubleshooting experience, you not attempt to probe anything in a modern computer, you can do serious damage just by touching te circuit board with your finger, and slipping with a probe can do even worse. Call a qualified electronics technician who specializes in component-level computer rpair.. + 0 Votes Start With TheChas 3 years ago Start with 2 years of electronics school so that you can identify components, how they work, and how to make measurements. While it is a lot easier to troubleshoot when you have a schematic, once you have a good understanding of electronic components, you can start to probe the circuits to see what is wrong. I usually start with the power supply circuits. If you don't have the correct voltages, nothing will work. Where I go next depends on the problem. You need a good scope to verify the primary clock circuits. After that, with a laptop you start to reach the point where the cost of replacing parts exceeds the value of the repair. Chas + 0 Votes Yes NickNielsen Moderator Updated - 3 years ago .