If you don't mind about warranty, search for DJ13 firmware. Maybe this cures your problem.
At this point, I don't give a (whatever) about invalidating warranty, I'm ready to throw this thing out the window and I think that would more than invalidate it! Having created literally hundreds of coasters without the drive hardly even burning it's lead-in at times has gotten me to breaking point!
So anyway, flashed the drive to DJ13 using the DJ13FAST file, and still no difference, same hangups, same problems with various types of discs, same coasters.
Apart from that, I wondered are my discs the problem... I know lots of people on here have their problems with them, but RITEKG05's I have been using for a long time now on this drive with no problems, and suddenly it doesn't want to burn - but really it depends on the "mode" selected in Nero. If it's anything using "Disc-at-once" you're nearly guaranteed it will fail. So tried a few TYG02's (Panasonic), and guess what? Same problem. Grrrrrrrr.... Pain in the ass is, I can take these same discs to my SONY-DRU-500A and my 710A and they burn 100% every time in both with no problems whatsoever.
CD-R's are also sometimes an issue with this LG, no matter what brand I use, top quality or bottom of the line, Disc-at-once again causes problems, moreso with burning Data discs though, don't understand it at all. Again no failures in the Sony drives though.
Concerning the 1635 - I wouldn't recommend that
When I was buying the LG 4167B it was between this and a LiteOn, am wondering now would the LiteOn have given less problems? Also, why do you not recommend to go for that LiteOn? I'm thinking of buying it as it's in my local store, and if I have problems with it at least I can take it back to them then it's their problem not mine.
So been looking at both LG GSA 2164D and LiteOn EZ-DUB SHW-1635SU, slightly swinging towards LiteOn though simply because of so many problems with my current LG 4167B drive.
Getting slightly frustrated here in the LG camp. Someone please help before I do some serious damage to this drive.