Where should I start with medical equipment repair? Are there any basic books? I i don't know anything about it.

If you do not understand the best first do not repair, in case the small fault into a big fault on the trouble. Really want to do it yourself, you can call the manufacturer's engineers to describe the fault phenomenon, let him give you guidance. Understand clearly, in the case of ensuring the safety of personnel and equipment and then do it. And make a good maintenance record. In the future, when you encounter similar failures can be repaired, which is also one of the most direct way to learn. There are also equipment manuals are very good learning materials. Nothing to see more, it will help you. It is recommended that you go to a local formal training institution to take a certificate of maintenance electrician. This is a must, just like a driver's license, even if the driving is good, no certificate or not! I hope my answer is helpful to you!