Windows 10: Second monitor suddenly stopped working, now gives me "No Signal"

I'm using an Acer Predator Helios 300 with Windows 10 on it, and I keep a second monitor an LG TV connected to it at all times. One day, right after I turned on the computer, it started showing me a "No Signal" message on the TV screen, despite the fact that the computer recognizes there's a second monitor plugged in and what exactly this second monitor is, an LG TV. Yes, I'm in the correct input in the TV. Now, I've tried many, many things: - It's not the fault of the HDMI cable as I was able to plug in something else to this TV using the same cable, in the same input, and I tried differ

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Second monitor stopped working

I have an second monitor which suddenly stopped working. The scond monitor is detected but displays "HDMI no signal"

I have:

- updated the display adapter driver from manufacturer (Dell) - no change

- tried the HDMI cable on multiple devices - cable works

- hooked up the monitor to another device via HDMI - works fine

- tried a brand new monitor - still see HDMI no signal

- hooked the laptop to my TV with the HDMI cable - works fine

- updated from Windows 10 to Windows 11 - no change

- cycled power on monitor and laptop restarting in a different order - no change



Very frustrating as it was working flawlessly for years. Any ideas?

 

Second Monitor has No Signal

Hi,

To assist you further with your concern about no signal on your second monitor, we would like to get some information from you:

• What is the make and model of your computer?
• Did you try to check if the second monitor will work if installed as the primary monitor?
• Aside from checking the cables, did you try to use a different cable?
• Are the right monitor drivers installed on your computer?
• Does your video card has the right settings for using two monitors?
• Did you update your video card driver?

We are waiting for your reply.

 

Second monitor stopped working

I had already seen most of those articles, thanks.

The only new suggestion was to run SFC or DISM.

I ran both of those bu still have the “HDMI no signal” on my second monitor.