PSP GO (start/select buttons not working)

[Crumbz]

i recently had to take apart my psp go to finish off part of a mod im doing. And i put it back together but i found out that the select button no longer works. And so again i took it apart thinking maybe dirt got in there. So i cleaned it with canned air and put it back together and now the start button no longer works either.
Does anyone have any idea how i would go about fixing it? I cant remove the old one to add a new one and i havent seen a housing that includes one.

So any ideas besides buying a new psp?