Compaq LTR-16102B

I tried to convert my Compaq LTR-16102B to the Lite-On LTR-16102B. The flashing worked and all my burning proggies recognise the drive. However I have reached a slight problem. The problem is that while I’m burning something to a CD, the LED light flashes from green to red constantly. Can anyone help me with this problem? Any assistance will be appreciated.

Is DMA on?

NERO Info Tool says that DMA is on.

hunnich if you save original bios OQSB in file , please send it on my Mail !!! :bow: