DVD RW 1653S reads DVDs erratically

My LITE-ON SOHW 1653S worked perfectly but now it doesn’t recognize most DVDs…It’s partched to firmware CS0T…
I haven’t tested out the burning part yet.
Can I repatch/downgrade to lesser firmware which is stable?
Any suggestions?? :confused:

Another firmware is not likely to resolve such problems.

Clean the drive, test it in another computer.