I'm using VERBATIM for burning, and never had any problem..
Verbatim has several product lines. These are also sourced from different manufacturers.
the burned audio cds work in any other player I have except my Rotel cd..but early cds (burned with ver:1.02) do work with the Rotel!!
I guess some update in firmware ver: 1.03 causing the rotel not to recognise the cds.
Do you have Nero CD/DVD Speed or Disc speed installed? If so, please run it, insert a disc that worked and then check the "Disc Info" tab. The value of interest is the MID (Media ID). Do the same with one of the discs that do not work.
I got 2 AD-7240S burners, but haven't tried burning with the second one yet..
Please try. And please also report back what burn speed you have used.
Is there any way to reset the burner to its factory defaults? or any other solution?
Since you flashed back to the previous firmware, I doubt your issue is related to the firmware update. Perhaps simply coincidence.
I own an ancient lo-end player (JVC UX-T1). This is extremely picky with CD-R. Verbatim "Made in India" don't work at all, I get better results with CMC or Ritek (both not really top quality) and Taiyo Yuden. And it depends on the drive that is used. Your Optiarc is one of the better ones for that purpose, but for picky players, I'd stick with 16x speed.