PSX backup not working on PS2...
 

I made sone backups of my PSX games but the backups do not work on my PS2 which is using a "switch" external modchip. The PS one logo screen appears and then it freezess. The game successfully loaded once and i have no idea how it happened. I tried the backup on my friends PSX and it is working fine. Anyone know what is going on?

PSX laser may be dirty or i can check something out which may be the cause i need your mod-chip`s name