Analogue-sequencer

Hi,

I just spent an hour trying to solve the following problem with no success. So if Colin or 
anyone else could come up with a solution that'd be greatly appreciated.

When I try to enter the Firmware Upgrade Mode the display never shows what's supposed 
to come up as illustrated in the manual.

Most of the time I get one line showing:

"v3.3 CHK =                "

and nothing else. The P3 would just freeze right there.

But the results also vary randomly. Sometimes one line showing "BAD DATA!" would come 
up straight away. 

Some other times the display would alternate between "Firmware check.." and "v3.3 CHK =               
" for as long as FUNC and PAGE are held, and would boot normally as soon as those keys 
are released, only that there would be some random settings after boot-up (FTS, User 
Conf, Part Chain, etc).

I've tried unplugging the cables from the MIDI IN and/or OUT, and I've tried 3 different 
MIDI interfaces (MOTU micro express, MOTU 828 MK 2, M-Audio Trigger Finger), but the 
only thing that's consistant is that I can't enter the Firmware Upgrade Mode.

Thanks in advance and Merry Christmas.

Jay C.