Ender 3 Pro LCD screen not responding

General Discussion
1

Basic Information:

Printer Model: Ender 3 Pro
MCU / Printerboard: SKR mini E3 V3
Host / SBC: Raspberry pi 4b/mainsail
klippy.log
klippy.log (235.3 KB)

Describe your issue:

…
Hello, my ender 3 pro’s LCD screen does not seem to turn on at all, and if i connect it to EXP1, it creates a really loud sound and the entire screen lights up. I triple-checked the printer.cfg (
printer.cfg (2.6 KB)
) but it has everything required for the lcd to work. Does anyone have any suggestions?

2

If it’s the standard Ender 3 display then did you use the modified cable for the SKR board?

3

Stupid question, what is the modified cable?

4

What would be the modified cable? The skr board supports the same cable. Thanks

5

You should check that the SKR board has the same pin layout as the Creality boards. Beeing a direct replacement it should, but better check.

6

When I used the stock Ender display I had:

[display]
lcd_type: st7920
cs_pin: EXP1_7
sclk_pin: EXP1_6
sid_pin: EXP1_8
encoder_pins: ^EXP1_5, ^EXP1_3
click_pin: ^!EXP1_2

With the definitions from BIGTREETECH-SKR-mini-E3/firmware/V3.0/Klipper/SKR-mini-E3-V3.0-klipper.cfg at master · bigtreetech/BIGTREETECH-SKR-mini-E3 · GitHub

[board_pins]
aliases:
    # EXP1 header
    EXP1_1=PB5,  EXP1_3=PA9,   EXP1_5=PA10, EXP1_7=PB8, EXP1_9=<GND>,
    EXP1_2=PA15, EXP1_4=<RST>, EXP1_6=PB9,  EXP1_8=PD6, EXP1_10=<5V>

it should work.
That if the cable is correct.

7

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