Avatar of Bruce Gust
Bruce GustFlag for United States of America asked on

My secondary monitor just went black for no reason. Why?

I have a Dell Latitude 5400. I'm running a secondary monitor using a HDMI cable that connects to the back of a monitor via an RGB connection.

Works fine.

Until this morning. It just went black and the monitor says, "No connection detected."

I shut my laptop down and rebooted. No change.

I disconnected the cables and reconnected them. No change.

I'm using this cable: https://www.amazon.com/gp/product/B07CTK4TH4/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 

...and my monitor is an ASUS monitor and I get you some more specifics if you need them.

The bottom line is that it worked and then, suddenly, it did not.

I will add that this is a work computer and I don't have administrative rights. Not sure if that makes a difference, but there's that.

One more thing: Here's a screen shot of my "Display" settings:

Displays / Monitors

Avatar of undefined
Last Comment
ste5an

8/22/2022 - Mon
ASKER CERTIFIED SOLUTION
ste5an

Log in or sign up to see answer
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform
Sign up - Free for 7 days
or
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
See how we're fighting big data
Not exactly the question you had in mind?
Sign up for an EE membership and get your own personalized solution. With an EE membership, you can ask unlimited troubleshooting, research, or opinion questions.
ask a question
Hello There

Try to manually select HDMI input on the monitor. If this won't help, ask your IT guy to assist you. Try a different cable first.
ASKER
Bruce Gust

ste5an! Your suggestion worked!

Why did it work? What was going on that I had to include that step in order to retrieve what had been working before without that step?

Thanks!
ste5an

I don't know the exact reasons, but as far as I know do not all cables transmit all necessary signals and/or the monitor is off when plugged in, so that Windows (or the driver) do not detect that a monitor is attached.
Your help has saved me hundreds of hours of internet surfing.
fblack61