Fault Phenomenon: Manitowoc MLC300 after startup, the cab display screen has no display, but other electrical functions are normal.

Troubleshooting Process:
– Checked display screen power fuse: fuse intact.
– Measured supply voltage: voltage normal.
– Checked video signal cable connection: connector loose.
– After re-plugging and securing the signal cable, the display recovered.

Root Cause: The display screen signal cable connector was loose, causing signal transmission interruption.

Required Parts: None (requires reconnection).