360 Plays Some Games, Not Others? Options

[Xplorer4x4]

My friends 360 got the infamous open tray error awhile back. We fixed it by tweaking the POT screws ever so slightly. Now his 360 reads GTA4 and it reads LA Norie fine, but he just bought the Witcher 2 and it refuses to go past the "WB Games" screen. I tried the pot tweak again with no luck. I tested the game on my rgh slim trinity w/o a flashed dvd drive, and it plays fine which rules out a possibility of the disc being bad(which I pretty much assumed it wasn't from the start). Any ideas what it could be?

[xboxdawg]

The laser could be bad. You should be able to get one off ebay for about $10.

[Xplorer4x4]

The laser could be bad. You should be able to get one off ebay for about $10.

I had considered the laser but my thinking is it plays other games, so if it was the laser wouldnt all games stop working?

[Xplorer4x4]

Little bump here for more feedback on this issue please.

[xboxdawg]

When the laser starts going bad it will be inconsistent reading games. Might read em one time then not the next time. Some games are harder on the laser than others.

There's only a few things that can go wrong with a dvd drive

- the laser
- the spindle motor that spins the disc
- the worm motor that moves the laser
- the rubber belt that goes on the pulley that opens the drive door

So you basically have to play mechanic. If you're getting a bunch of grinding noises a lot of times it's the spindle motor. If it's having trouble reading the disc and no grinding noises it's either the laser or the worm motor.

If you had another drive of the same brand around you could experiment and swap out parts and see. But if I was to bet I'd go with the laser. Of course for $20 or so you could get a new laser and worm motor. Or see if your friend will let you experiment with parts from his drive. Good luck!