Sony d-100 Sled motor go out not go in the center

Hi..I have d-100 with problem like this. When I press play the lazer go out a little bit and try to get forcus,tracking, the center spin but ofcourse it's cannot recognize the cd. After a period of time to test, sometime the lazer can go in to the center and after that it will go out again. Can any one help me to fix it please? Thanks

 

D-100 was the only Discman I bought broken, but in good cosmetic condition, to send directly to Kaosun to repair. I see you have asked this same question over on the Kaosun forum section for D-100, good idea, they may help you with suggestions.