[TenTec] O II Background flicker?

[cx7tt at 4email.net]

I recently changed the LCD Display and found that the light colored 
background flickers when sending cw. Doesn't seem to matter if using 
600w or all the way down to 5 w, I still get the flicker. Tried two 
different antennas plus dummy load directly into the back of the OII, 
still the flicker. I even wrapped key cord thru 2.5" toroid, still get 
the flicker. This is apparent with Blk/Wht and Colors 1-2-5-6-7-8; 
anybody else see this?
Tnx & 73
tom