laser adjustment

[charlie_ps2]

Have you tried at least one high quality DVD-R? They have about double the reflectivity of cheap DVD-Rs. DVD-RW are usually much higher quality compound than unbranded DVD-R.

You should try this just to be sure that it's a media problem. Recalibrating may incrase the laser power for the lower reflectivity DVD-R but your laser will burn out in the short to medium term.