Ah, just discovered I needed to be a little more patient. A few seconds after powering up the 5000 will flash all the indicator lights and sound the alarm. Just like the 3000 did when waiting for by pass of auto purge mode, but if you just wait a few more seconds the alarms stop and it just dispalys the "Spectra..." screen
. So, in fact it was not going into auto purge mode. Just appered so to me.
Interestingly though if you do press "auto" and "stop" to by pass purge mode, it will display "purge mode by passed"....further supporting my misunderstanding that it was going into purge mode.
Much ado about nothing.
Yes, set Brightness to "00" (as low as it will go). Just whinning.
But while I'm whinning....sure would be nice if they would at least send a little sticker for the control panel
to "upgrade" it too. Mine still says "MPC 3000". Running flawlessly now though despite that. ;-)