need serious help

[pontiac]

i had my chip sodered in by a person who works on tv's and vcr's. i reassembled my ps2 but nothing works, it powers up but it wont read anything, no disk will load , the disk turns maybe a quarter of an inch then stops, any suggestions or i thought i read somewhere i can sent my ps2 to some one to have them diagnose the problem and fix it?
i really need some help fast , ive been messing with this since x-mas and i can put up with it anymore im getting to stressed out.


thanks