$75/hr + parts

Computer technicians once closely resembled electronics technicians. They had soldering irons and multimeters at the ready. However, due to the modular design of PCs and the proliferation of Six Sigma, computer technicians don't actually repair anything anymore. Those super technicians have moved on to geekier fields where things still need soldering.

With respect to repairs, it consists of a process of elimination. When you hire a tech, you are paying for the skill to figure out the problem and the access to spare parts for testing.