Good morning colleagues. I get this equipment from another workshop the problem is that it does not turn on just turn on the standby LED. I checked and found the Q902 (C3807) in short and the R955 carbonized resistance. I replaced it and they burned again. Checking the service manual, Q902 shows me the 2sb1238, but the one I was wearing is the 2SC3807. I must note that disconnecting the power connector that goes to the stk does not burn the transistor. If anyone knows which transistor is correct, it would be helpful. on the other hand the display does not turn on at all. So my friends hope for your help.