[B1257]

I 100% sure that problem is in laser try to clean eye with spirit if not help you then replace laser there are plenty at ebay

Shure it was the laser, bad jitter 100%.
If you replace only the laser you need a Jig for realignment. Without the software to store the new settings (tracking and focus) in the drive it is not possible. I tried it in the past and I have jitter meter and the complete measurement for broadcast stuff, even MD. This laser can handle doulbe layer DVD, so alignment is a must have for good results.

Buying a new whole drive is better, always provided, that the broken flash is not on the main unit.

Only laser is wasted money.