Sony DW-D56A refuses to read CD

The Sony DW-D56A on my Sony Vaio A290 read DVD but refuses to read CD audio or CD-Rom. How to fix this problem ? Help please.

the drive uses two lasers, one for cd and one for dvd.
can you boot from a cd? if this doesn’t work then it seems that the cd part is broken. you can’t fix this except with buying a new drive.

Effectively I can’t boot from a cd, so which is the best and totally compatible DVD burner to replace the sony ? thank you for advice