Have you tried Rogero 4.30 CFW v2? I would try to boot them from there and see if its the firmware problem. The firmware you are currently running may require you to patch those games again for 4.XX. I heard Rogero v2 doesn't require this. If they still don't work, then there must be something wrong with the HDD in general.
I would try Rogero 4.30 v2 and see if it works then. If so, then its a problem with the firmware. Otherwise, you can use whatever CFW you want but you would just need to patch them for 4.XX (corresponding to your cfw version)