I've got a similar situation regarding removing jjos 3.09 from my friends mpc 2500.
I had it on mine back home and had borrowed my buddys for the last few months.
For whatever reason he doesnt want jjos and I've followed the directions at the akai site but when I power it on holding the "window" button , nothing happens. Just a blank green screen. Now he thinks I broke his mpc or something. I mean , it still loads the jjos but I cant install the akai os.
Any help would be appreciated.
I'm hoping it's something simple I'm missing but I think I followed the directions properly.
MPC 500, 2000XL 2500 3000 , 2 MPC 4000s , & MFC 42
Akai s950-S1000 S2000-,Sp 1200 , Korg Triton- ASR 10-EPS 16 rack- Digi002 PlanetPhatt-Imac-Macbook Pro-MPC Studio
Yamaha aw 16g etc & MAD records.