Hello everyone I bought a yamaha m 40 amp on ebay three months ago its has been working great up until last week then it just shut down on its own and will not power on , I opened it up and noticed the fuse was blown so i replaced it and tried to turn it with no luck but i noticed burning smell and smoke coming from a resistor. So i downloaded the service manual from hifi engine and looked up what resistor it was and replaced it with no luck again it lit up the resistor as soon as i turned it on . Is there is anyone who knows about this amp and could help me the resistor is R171 on the schematic