Good afternoon I have a power supply 12v 27 amps What happens is that before she sent 13.8v but then with the time using it, she sent 18v I opened it to check it if I had something burned but I don't see anything, everything seems fine, I don't see a siolated or defective capacitor either, and what I saw on the board was 3 transitors but I didn't check them to see if anyone can help anymore I don't give the damage