Okuma LB15 bubble memory issue?

[cmcraeslo]

Hello guys.

We have a LB15 that just refuses to boot all of the sudden. It has OSP5000L-G controller.

This is what we get on the screen after booting:
SBPII E2.02
MEMORY TEST OK | 0000
LOAD:SYS

LAA06-06-E.POL
LAMG6-06-E.POL
LBA06-06-J.POL
LBMG6-06-J.POL

It stops there and does not continue.
I checked the card box, carefully disassembled and connected all the cards back, but nothing changed, still same error.

Could this be a famous bubble error? I have a diskette that came with the machine, but I do not have a floppy drive for that 8" diskette.

What are my options? (apart from going to the Okuma dealer who will probably not deal with this old machine anyway, or charge way more than it's worth)

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[cmcraeslo]

Oh and after the reset, there's a green screen and prints:

CNC V110 LIC V110
WORK-1 RAM TEST OK
HALF-C V-RAM TEST OK
FULL-C V-RAM TEST OK
WORK-2 RAM TEST OK
LIC WORK RAM TEST OK
LIC C1 PLANE TEST OK
LIC C2 PLANE TEST OK
LIC C3 PLANE TEST OK
*** CRP READY ***

I also checked 5V, 12V and 24V and they're all spot on.