If it's what I suspect it is -- a mod chip for a 
video game console -- then you probably DON'T 
want to take that to a repair shop, since I 
believe mod chips are illegal in most European 
countries, as they technically are here (USA).

The mod chips in my consoles were all installed 
by a friend of mine who used to do a lot of 
circuit board work as part of her job. From 
everything I saw, installing one could EASILY be 
screwed up by someone who didn't know exactly 
what they were doing. (Hence why hitting it would 
make it work.)

Many Sharp Smiles,
--Drac