Following the advice of bperrybap i start my own thread.
There Arduino Mega 2650 and a graphical LCD screen digitron SG12864j4(http://www.digitron.com.hk/sg12864j.htm).
I plugged it in just like in the manual(http://www.arduino.cc/playground/Code/GLCDks0108) Pinout B, found in the Arduino IDE library GLCD, uploaded an example ks0108example, but no data on the screen is not displayed, only the backlight is turned on.
I’ve uploaded GLCDdiags sketch, but no data on the screen is not displayed.
What could it be? The screen is faulty?
Here the data from the Serial Monitor:
GLCD Lib Configuration: glcd ver: 3 glcd_Device ver: 1 gText ver: 1
GLCD Lib build date: Mon Dec 5 01:50:07 CST 2011
GLCD Lib build number: 442
GLCD:ks0108 DisplayWidth:128 DisplayHeight:64
Chips:2 ChipWidth:64 ChipHeight:64
RW:35(PIN_C2) DI:36(PIN_C1) EN:37(PIN_C0)
D0:22(PIN_A0) D1:23(PIN_A1) D2:24(PIN_A2) D3:25(PIN_A3)
D4:26(PIN_A4) D5:27(PIN_A5) D6:28(PIN_A6) D7:29(PIN_A7)
Delays: tDDR:320 tAS:140 tDSW:200 tWH:450 tWL:450
ChipSelects: CHIP0:(33,0x1, 34,0x0) CHIP1:(33,0x0, 34,0x1)
Data mode: byte