[Elecraft] K3 : 8 ERR messages

[Arie Kleingeld PA3A]

Hi all,

Starting this week, my K3 #1255 (year 2008) started showing ERR messages 
when I swithed it on.  First ERR message was ERR BP1.
After pressing any button of the K3 the following messages appeared:
ERR LPF, IO3, IF1, XV3, AT3, PA1 and BP3.

After cycling through these messages, they are gone and everthing works 
as normal.
Switching the K3 off and on again immediately after that, the same thing 
happens again.

Switching the K3 off and on after 5 mins of operation, everything is 
normal, no messages at all.

Could  this be caused by an empty back-up battery? Wonder if other 
owners had a simular problem.

73
Arie PA3A