Barry writes:
<<The Right screen on my Chelton EFIS has died....well, it won't boot  up and just shows a white screen.  Suggestions?  >>

You are getting power but the processor is refusing, or being prevented, from booting. Swap screens (and wiring) to confirm the problem tracks the hardware and not the panel position. Contact Chelton customer service and send the unit in for checkout and repair. Include any incidental information regarding the failure.

Good thing you have a built in spare.

This is a good time to point out that the sensors are wired into one of the IDUs then "daisy chained" to the others in the system. If you remove one of the links in the chain then everything downstream wont get the data it needs. If you want to use the remaining display you need to shuffle the displays' wiring so that the missing display is the last one in the chain. Consult your aircraft's MInimum Equipment List for limitations regarding one screen operation. If I were you I would limit my flights to Day VFR until you have full system capacity (with redundancy) restored.

Thanks for providing a timely example proving my point. Like Jeff said, everything breaks.

Regards
Brent Regan