Per the Icom page,

OS not lost, just need to reset cpu.

"Mike Y" wrote in message
...

"eeyore" wrote in message
...
If left uncharged, the internal battery runs down. The radio may need
a
reset.
Suggest you try this first:

http://www.icomamerica.com/support/faq/amateurfaqs.asp


Is the R1 one of those radios that will loose it's own internal operating
system
if the battery goes totally dead?

Yep, there's a few of those out there. Don't recall if the R1 is one of
them
though.

I remember seeing aftermarket kits for some of the ICOM radios that did
that.
One kit for one of the radios even had 'downloadable' operating system
over
the serial port, but always had an 'on board eprom' sort of like a BIOS to
at least always be able to bring the radio up from dead.

I thought the concept was pretty neat, actually. Just the implementation
was
brain dead.

Mike