How to solve 'no signal input' in projector or external monitor

How to solve the error "no signal input" when trying to connect a projector or an external monitor to a computer or laptop.

How to connect and configure a projector playlist:

[mrmr]

Hi, so I tried to use hdmi cable with my Xiaomi Mi projector - it works from a laptop, but the projector doesnt find a signal if I try from my pc, is there anything in the pc settings that could be wrong? (The TV sees the pc however)

[hungkieu]

Hi, my laptop show screen 2 when connecting projector but projector says no source input. Could you help me ?

[Mat-fwky]

My projector worked connected to laptop via vga, but no signal with tablet or phone when connected with a vga to USB C adapter. Any ideas why? Thanks.

[jdolguin]

Como es que yo puedo conectar mi proyector con un sensor y se activado por medio de el ?

[lostintime]

Mine works but when I update my graphics drivers it just has no signal. I'm running out of ideas

[umairwagan]

Its not showing second screen even with this? I have new acer x118h projector trying to connect with hdmi