need help!

[critter01]

Guys, have gone thru the basic trouble shooting as far as checking dry solder joints,cleaning pots, checking for loose wires also basic signal tracking but i just cant get my amp to work again.  anyway heres how the problem was caused, Nephew thought he would run his Playstation thru the input of my Guitar amp - resulting in little or no sound when guitar was plugged back in to the input .can someone please help.power indicator light is on,it hums as per normal but there no sound when i touch the "hot" terminal on the lead when plugged into the input( lead works fine) if the output voltage from the Playstation was to excessive,which componants would have failed and which ones should i replace. .cheers     

[Jack1962]

check the 1st resistor off the input jack , then the 1st transistor or opamp.

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