DD-20 needs some saving

[taylorchuck15]

I have a DD-20 that is my friend's, and it doesn't work. The power light comes on, but the pedal itself doesn't. He told me that he thinks somenbody plugged in the wrong type of power supply and something could be fried in it. So(being obsessed with building pedals), I decided to take a look inside. I noticed that there might be a part missing on the lower left side of the circuit, so that would probably be the problem, but I dont know what the part is or whether it would be possible to replace it. I'm sure he could just send it to Boss and pay a rediculous amount of money to have it fixed, but I think it would probably be faster and cheaper to fix it myself. Is it possible to repair micro circuits like the DD-20?