'05 Yammy F250 muti-guage not working

Twin '05 F250 4strokes. Multifunction guage (tach,trim,engine & trip hours, oil press, etc..) does not display correctly.
Port side no problem.
Stbd: Turn on=welcome msg, then the following:
1 blinking bar on trim display.
Tach shows just a horiz. line w/o x100 r/min.
All other features just show their respective symbols w/o arrows.
Hour meters have letters w/o #'s .
Battery display shows L_________H w/o arrow, as well as __._V for voltage.

Holding the set button and mode button in together for any length of time only brings up a screen showing:
LIGHTon/off
Sync 1-5
(I have tried each of these 'syncs' and no luck).

Hope I haven't confused everyone. These symptoms developed after replacing the stbd. lower unit. My guess is that there is some type of master reset or something associated with the CPU?????

Any input is greatly appreciated!

Re: '05 Yammy F250 muti-guage not working

The rigging guide should point you in the right direction. Something left unplugged or a ground?

Re: '05 Yammy F250 muti-guage not working

start checking the connections from the engine,to the multi hubs and then to the tach itself.
in the rigging guide you will find the instructions for tach resetting if needed.
sounds like something is unplugged.
make sure all terminating resistors are in the hubs.