[j-nsp] RE-3.0 740-007603 not working in a M5/M10?

[Jonas Frey]

Hello,

i am just experiencing and strange problem in regards to a
RE-3.0/RE-600. Its working fine in a T320 but not in a M5/M10 (normal
FEB). Its part number (from show chassis hardware on the T320) is
740-007603 REV 1. 
It appears there are several RE-3.0 with different part numbers, this
one seems to be the latest.
When using this RE in a M5/M10 the system doesnt bootup, console shows
nothing.

Anyone aware of a 2nd gen RE-3.0 not working without E-FEB?

Regards,
Jonas Frey