Now I know these forums have been flooded with people asking about how to fix their UMD drives, i've read almost every thread!
From Google and forum searching I have found that these are the main checks:
-Hold down the tab in the UMD drive and see if the laser works - OK
-See if the disk spins when you open the drive - OK
-See if the laser is moving up and down when trying to read - OK
I cannot think of any other reason why my PSP wont read disks, I have even removed the screw so it shuts properly!
Any help is appreciated