Hi

I have an Okuma LU15-M with control system of OSP7000L, 1995. A few months ago when I tried to start my machine, the following alarm is shown:
352 memory disk ROM write ERROR DC0EB250

I tried to reload my machine software using 7 original floppy disk, but the machine just loaded first 5 disks and then the new error is shown:

SSW=0145 ACCESS ADDRESS=DC0000F8

I tried to reload again and the error is changed to:

ACCESS ADDRESS: DE000000

I sent my machine memory boards to repair, but the machine error is still remained and I can not start my machine. Is there any one who can help me?