was working on the turbo cd and thought should add my notes on here:
have a turbo cd with working laser and assembly but bad mother board. Would power on but game would not spin. Checked everything possible even changed the pot settings. After changing all the caps all the 4.7 uf caps were dead,like 5 of them bunched up near the pot settings. 5 is enough to cause laser failure. There are 2 more 4.7uf caps that are really tiny back to back on the board but they were functional so i put them back. I have a capacitance meter to check the caps as i remove them.
Powered on the unit with no change. Another member on here Bluebmw had a similar problem with his turbo cd. Changed the laser,adjusted pots etc but would not spin the game only a quarter turn. He also changed the caps i mentioned and no change. Changed more caps and had a laser trouble where the ribbon got torn on the lens side,the smaller ribbon. Sent unit to me where i tried a working laser and it worked.
I messed more with the laser with torn ribbon and did a transfer of lens from a old laser with a dead diode:
and it worked. 90% of the time the diode burns out like a lightbulb. The lens may last longer before the wires start popping on it or the lens gets scratched.
Used a very tiny screwdriver 2 mm flathead to unscrew these tiny security torx bits that were in there. If you attempt this do your best not to undo the bed of glue that holds the lens part. Its needed to balance it out. So small i cant take a pic but you can see it on the laser holding the 2 parts together after you remove the screws. Hopes this is useful info to some
