I just got myself an HD740GX off eBay a few weeks ago for cheap. The burner was showing signs of failure (not surprised, Liteon puts crappy burners in their recorders). I tried a Sony 190 and for some reason that model didn’t work in the 740, it works great in all my other Liteon-based recorders, but not the 740. I have a collection of spare Liteon and Sony drives for my recorders (ILO HD04, ILO R04, Liteon 5005 and 5007 and now the 740GX).
Liteon 1635 (in the 740GX now)
Liteon 20H1p (no fast forward)
Liteon 20H4p (no fast forward)
Sony 820 (fast forward a bit sluggish)
My observation is that the drives replacement for the 5005 on the sticky list on this forum is good and they work as they would in the 740 as they would in the 5005 other than the Sony 190.
So if you don’t care about FF, any on the list will do. You’ll just need to dremmel a slit in the back of the 760 to pass the cables (IDE and Power).
I personally installed my burner inside but I had to dismantled the 740, disconnected all the cables and ribbon, you need to remove the hardrive to accomplish this, remove the front display from the case, removed the metal back plate of the front display and dremmeled off all the obstructing parts of the drive cavity, I bent a piece to make an “L” bracket which I drilled a hole on the side to fasten on the drive and drilled the bottom of the case to secure it. It was quite the project, took me about 4 hours, next time I need to change a drive, I’ll be able to do it in about 30 minutes.
PS. While I had the display panel off the back plate, I took off the StandBy/Eject button circuit board and snapped off the blue/red LED.