The number "2" on the right, let me think it is a software/hardware issue, maybe a bad flash or something.
This means that no valid saved data have been found on the cart, saved loops/songs have been wiped or damaged. You can proceed with B+START+SELECT, this will clear the memory and delete any data fragments that may still be on the cart. If you have no backup but really need these data, do not press START+SELECT and send me the cart instead, I may be able to extract some banks remaining in memory.
The 2.5 cart hardware, which is different from the other 2.x versions, is generally more prone to data loss.