7i73 LCD shows rubisch

Hello,
Someone trying to connect an OLED display on a 7i73 ?
I rated 1 LCD display and 1 OLED with Arduino, both are working (but rows permutated on oled )
But on the 7i73 the LCD works but not the OLED
thank you

Linuxcnc 2.7.14 5i20 SVSS4_8
www.lcd-module.com/fileadmin/eng/pdf/doma/olede.pdf
(it's the same as the NHD-0420DZW-AG5)

I wonder if there is some initialization code needed on the OLED display
do any commands like clear screen work?

thank you PCW,

I do not know, I use Andy's "lcd" there
has no clear screnn instruction.
With arduino, oled and lcd start at power on

I have 2 new 7i73 unit the display is different under the same conditions ?
unit 1300010A
unit 13000168

Yeah, the display looks random though all 7I73s since 2013 have the same firmware.

Clear screen is ASCII 0x1A

Ok, I saw that we can send control characters with lcd component "\HH"

I sent 0x1A, 0x0D also, not really effect, it changes the random side.
I forgot to mention that the display is also very animated !

Yeah maybe the OLED controller is not close enough to the LCD controllers to work properly with the 7I73 signals. We did verify operation with many LCDs
but (relativley) low cost OLEDS were not available at the time we did the testing.