p3a amplifier debugging

anyone who can help me, i am having problem with the p3a of my classmate, the amplifier vu meter lights on when volume rises and also the speaker sounds like bo bo bo bog {sorry i cant describe it well}, i hear that also when i rise the bass control {the amp has a tone control}, and when i rise the treble screeching sounds is the output , with the vu meter rising,...

another one is even i adjust the other channels trimmer , the dc out voltage is to high,{this without load speaker..

hope you can help me guys...
Here are the actual pictures,...

ill already finish mine i check it thoroughly so i encountered less problem, this is my clasmates amp, sorry for my bad wiring.... ill tie it when im done,
here are the pictures


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