[TenTec] Orion II Display problem?

[Rod Greene]

During SSCW I noticed (after a few hours of operating) the number 9 creeping in from the right side of the display. It never completely became visible, but was definitely there and in large font. Later on in the SS a third megahertz number appeared on top of the regular megahertz numbers for each VFO. I could correct this easily by turning the OII off and back on. I was using N1MM+ in SO2V mode. 
Any thots on this or other similar experience? I have replaced the A9 board caps last year. And the display is working fine today.
Thanks and 73, Rod/w7zrc