Magic 2 on V5 : HELP !!!!

Hi boys,
this post for the best technicians of the forum.

I have installed a Magic 2 v.3.0 red pcb on PS2 V5. After few days the customer has returned it, doesn't work any game or DVD.

I have eliminated the chip, PS2 starts to load the game after 50/60 seconds.

I have seen how the lens works each other holding opened the console, it doesn't begin to load and spin immediately as soon as I insert the cd but after some second.

Why this? What has happened?

Please help me :cry:

Make sure the ribbion cable is in all the way and aligned correctly when inserted into the ribbion connector on the laser head itself. Its easy not to take the time to check this and pass it up. Its hard to get that brown clip seated correctly to clamp down on that ribbion sometimes.