What happened?
The printer is displaying the message: Display test failed, check the connection between the display and the A64 board.
Error name: Display test failed
Error code: #10120
Issued when the printer was not able to test the print display.
How to fix it?
Check the cable connection to the mainboard. Be careful as the print display flat cable is very fragile.
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| Original Prusa SL1 display cable | Original Prusa SL1S SPEED display cable |