pass x2.5 problem

Hi all ! Summer time in Greece(hot) and my beloved pass pre is refusing to follow the orders I give ,either with push buttons nor with remote. When turned of and let cool down it is back in use. When hot again ,after 5 hours in mains the problem appears again. I opened the lid and by spraying the processor chip(the one mounted in a base) with 'freeze ' spray everything works fine. I guess I need a new chip probably by pass labs . I would like help to get it somehow , thanks !
Greetings to all!
 
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Fortunately problem was solved ! The cause was the high temperature within my listening room last August . Since then the pre works flawlessly and amazing as always . Probably 38 degrees Celsius is not a healthy idea for any class A device . An air-conditioned listening room is the solution . Greetings !