Yamaha RX-V373 automatic shutdown after 5 seconds

[Solo_Yamaha]

Hello,

I am new to this forum and this is my first post. I was googling and found this forum with experts in Yamaha repairing. i would be thankful if someone could help to fix my receiver. When starting the self diagnostic mode it shows a dc_prt 255H message and shuts down after 5 secods. By checking the service manual downloaded from i found that the voltage at the power amplifier DC voltage is high.

I have removed the cover to check for any burnouts or leakage bu didn't find any. I have all the tools to start checking and repairing but i need some guidance were to start.

Any help would be appreciated!!

[tibimakai]

Usually, I just go to the final transistors and measure for short.

[Solo_Yamaha]

i couldn't find the final transistors i can only see the capacitors, resistors and relays at the outputs.
I got the service manual from manualslib.com/manual/1082963/Yamaha-Rx-V373.html

[budm]

Please upload good clear pictures using 'Go Advanced' so we can see what we are dealing with.

[petehall347]

output devices are generally fastened to large heat-sinks

[Solo_Yamaha]

I am sorry for the late reply but i had very busy week. i have attached pictures of circuit boards with few diagrams from the service manual i found online that i think might help.