Lenovo ThinkPad X1 Carbon Gen 13 screen is black, blank or flickering

A black screen on the ThinkPad X1 Carbon Gen 13 is described in Lenovo's own user guide FAQ and in repair guides, and it begins with a key combination: Windows logo key, Ctrl, Shift and B restarts the graphics driver and wakes a screen that has gone dark after sleep or an update. Intel community threads link black screens on X1 Carbons to graphics drivers, so update the Intel graphics driver and Windows. Then separate the panel from the system: press Caps Lock and the Fn+Space keyboard backlight to see whether the machine responds, and connect an external monitor through USB-C or HDMI; a picture there means the laptop is running and the display path is the issue. A power cycle clears a stuck state:

shut the laptop down, disconnect the charger, hold the power button for fifteen seconds, reconnect and start. The Gen 13 can have an OLED panel, and OLED black screens after sleep are often driver or power management issues. Check the power plan so the display does not turn off too fast. A screen that is black at the ThinkPad logo needs Lenovo. Lenovo's X1 Carbon Gen 13 offers an OLED option, and OLED panels have a feature that dims or turns off the panel after a short idle time, which looks like a black screen; moving the mouse or pressing a key wakes it. Check the display's idle timeout in Power options, and note the privacy screen on some models that makes the picture dark from the side.