Lenovo Idea center AIO monitor problem

[rogerballard]

Turned on computer, message on monitor: input signal not detected. Blank, black screen. Tried all the usual with Lenovo support no help at all. Baffled to say the least.

[canetoad]

1. This could be a tough one

All in one computer?

When you press the button to boot the computer are you hearing any very faint beeps? Really faint - they will come from a tiny speaker on the motherboard.

Assuming it's an intel MB, here are the diagnostics for the beep codes. Not much help, sorry.

https://bytespeed.com/intel-beep-codes/

[rogerballard]

2. No beeps

This is my third all in one Lenovo, can hear click of the on and off button like a normal boot, I am thinking graphic/ video card perhaps

[canetoad]

3. If it was a video output failure

I think you should hear the beeps. I saw a reply on Reddit where someone did a few restarts and it worked again.It's hard to say remotely (my last all-in-one was a Mac Plus in the 80s!) what's going on; first thoughts are somewhere in the physical connection between the mobo and the screen but apart from checking the visible parts I have no idea.

[rogerballard]

4. Thank you

I can’t even do a restart, I have tried pretty much everything and I think it is beyond my remedy attempts. Just ordered a new comp, be here tomorrow. Thanks for your input!