Problem with philips sdvd8441

I have Acer laptop wit philips sdvd8441 dual layer. I upgread the firmware to px47. I think that the speed is a little bit better but the problem is that I canno’t read dual layer dvds any more? Any suggestion?

Flash it back with the firmware that worked!

The problem is that I don’t know which one was the original. If I format the HDD will it bring it back?

I have an Acer Aspire 5510 with the Philips SDVD8441. One day I was trying to burn a black coated Cd and that was the last time the CD functionality worked. Now I can only read or write DVD, no more CD. Some of the DVD that I have burned does not open in other units. Suggestion and/or solutions are wlcome. Thanks in advance

I too have a Philips sdvd8441.
At best it is tempermental.
Sometimes it will recognise a disc- sometimes not.
Sometimes it will allow you to read, not write.
I use DVD + Rewrite - Mr DVD or Logic.
Can anyone suggest a make/type which works?l