Boot check, found that most of the disc are not read, only a few relatively new dish can actually read. BmEservice manual download site
Open observation, found bald with a layer of soot sample material, after washing clean, reading ability has improved, but still not ideal. Judging by baldheaded smudgy degree baldheaded internal have smudgy. The objective to be removed, and sure enough, the back mirror, mirror surface diffraction grating, photosensitive receiver all have different degrees of dirt, especially in the mirror surface is serious, thoroughly clean the dirt, after installed, reading is normal, we haven't been able to read the disc can be read quickly.BmEservice manual download site