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After I took the fundamental course, I can know almost 50% of the electric board. Including the electric board in my housed, very excited to looking forward to intermediate course.

I have been a changingneer for ten years, and I am fortunate enough to study with poon sir. I have found changes, and I have regained the joy of work. I need to start testing, measuring, using electricity meters, and observing. I hope that I will also encourage everyone to cheer.

The first monitor I repaired by myself. I didn’t know anything about electronic devices before. When I was in class for the first time, I couldn’t understand at all at the beginning. Now after the resumption of the class, some things began to understand. Thank you poonsir for your patience

I got a Cooler Master 750W. After taking Poon sir’s intermediate course, I learned more about Power Supply’s expensive price. Some power transistors are sold locally for 15. These are some of the damaged parts.

Yamaha antique electronic keyboard PS-Q, crashed, finally fixed it. When I opened it last month, I was a little shocked. It is the first time to repair such a dense electronic version. Thank you poonsir for your teaching

Thank you for the reference detection method taught by poonsir, there are circuit wires at both ends, and the flying wire solves the problem

toyota camry acv40, the electric board has been repaired, thank you poonsir for your help and teaching！

Volvo d12 computer version has been fixed, thank you poonsir for your patience