@Tom
I try the "Cycle Test" with "ALL PASS" as a result. Also make the error clear process. Nothing change!
The manual says cause if you have some error there, a diagonal line on the screen appear.
I haven't any diagonal line on my case.
@iamachine
Every dot is one of the lower part of character, in exact place in between groups at bottom of screen, who text disappear. All the characters appear in place of dots (not left or right), when some button pressed. For example ch3 or ch4 or ch2 or 20 Mhz bw limit etc.
Panos.
