There are 2 possibilities.
1.Your Laser is dying
2.One of the wires are coming off but if it did it wouldn't even load the game half the way would it?
To be honest Neo4 is a sh**y chip that gradually kills the laser compare to the Knife/CC trick except slowly..
This is the only thing I could think of.
I heard so many horror stories on Neo4. While several machines last longer on it but there are some out there the machine's laser's die faster.
I suggest Bill with
www.Freedomlives.com for Technical support. My advice is get a Magic2 non swap chip where the laser stays neutrol..