I know the question sounds very stupid but I wanted to ask if a laptop whose "charging cable" is broken can be used as a second monitor for a PC
A monitor also needs electricity. If that's the problem, the laptop won't help you as a monitor either.
No, HDMI etc. Does not transmit electricity. He needs it. In addition, a laptop usually has no screen input
This is only possible if you install a laptop on both PCs and then hold the second PC. More here: https://praxistipps.chip.de/...erts_41059
No, that's not possible, because the slot on the laptop is an output - you would need a capture card that first converts the signal that you want to send to the "monitor" into an image signal and then displays it on the monitor.
To do this, the laptop must also run…