Unix on a 3B2-700 won't boot

I have been going round and round getting it to boot and am at
the point where it might be the sd630.img disk image.

It keeps hanging in "DIAGNOSTICS".

I have reloaded all the files to no avail. Does anyone have a
known working copy of sd630.img they could share as a gzip ?

Other sims work fine like 3b2-400, Interdata-32 and PDP-11.

Ken

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WWL 📚