Mitsu WS55907

I just recieved this WS55907 because it didn't work. I used the input and menu buttons and recieved a 22 code, which is a short circuit problem. So I was told to change the capacitors and it would fix it up right. Does this sound right and would it be possible for you to point me in the direction of where the capacitors I'm supposed to replace are on the circuit board? I also have a VS50707 and that gives me a 12 code which is no error occured. But was told that it is the capacitors or the transistors on this model are prone to going bad. Any help would be much appreciated. My email is [email protected]