My NEC 2510 has been flawless until recently. I used a modified 2.F8 firmware and am running XP home, SP2 with Nero 6 as the burning software.
I use mostly 4X media. Recently it simply stopped recognizing Verbatim MCC 01RG20. DVD identifier can not read the media ID. Sometimes it recognized a burnt MCC as a blank CD. This burner has burnt at least 50 discs from this spindle. These very same MCC discs burnt fine using my other burners. Other media are still working as usual, which include TYG01, TYG02, TTG02, CMC MAG.AE1, Ritek G04, RicohJPN-W11.
I have updated the FW to a modified 2.F9 and updated Nero to 188.8.131.52 by uninstalling and reinstalling. I have uninstalled/reinstalled the device, as well as doing a system restore to an earlier time point but to no avail.