Monitor powering on but not showing any display

[jumungo4]

Having issues with my monitor - it powers on but trying to connect via my macbook pro and usb c adapter via HDMI but i get no content on the external monitor.,

 

Please see video here - https://gofile.io/?c=9Jo9eb

 

any help would be great.

[Mindovermaster Global Moderator]

You have the screen enabled in Mac display settings?

 

Also, your back light might be dead. Does it work on another computer, perhaps? Just to verify.

 

Very unlikely, but the adapter or HDMI cable might be dead.

[jumungo4]

Is that in Displays? Do I need to allow dual monitors?

 

Will test later on another computer - HDMI cable I just bought this afternoon.

[Mindovermaster Global Moderator]

I never used Mac, so just the display settings "might" not have the second display detected. Years, years ago we had to do this in Linux, too.

 

HDMI can be DOA. But test that monitor on a different PC just to be sure.

[techbeck]

I have run in to issues with using adapters to display video.  May want to check that.  Also, some troubleshooting tips from Apple....

 

https://support.apple.com/en-us/HT201177

[techbeck]

4 hours ago, Mindovermaster said:

 

Also, your back light might be dead. Does it work on another computer, perhaps? Just to verify.

Not sure if it so works on newer displays, have not had one go out, but I used to use a flash light to tell if the back light died.  Shine the light on the screen and should be able to make out something. 

[Mindovermaster Global Moderator]

21 minutes ago, techbeck said:

Not sure if it so works on newer displays, have not had one go out, but I used to use a flash light to tell if the back light died.  Shine the light on the screen and should be able to make out something. 

It always seemed to work for me. /shrug

 

Why putting it on a different computer will varify that issue. Or you can use a flashlight, too..

[DentedAphid7]

What adapter you using? I mean what brand and which one? (That shouldn't really matter)

Have you go to setting and detect/enable dual display? (I had to do that on mine)

Is HDMI cable at it's faults? (Could be faulty cable or the cable don't support your desired resolution)

[jumungo4]

11 hours ago, techbeck said:

Not sure if it so works on newer displays, have not had one go out, but I used to use a flash light to tell if the back light died.  Shine the light on the screen and should be able to make out something. 

Yeah I can see the windows very lightly on the screen in the dark.

 

Does the brightness need to be turned up or is it the backlight that has gone?

[techbeck]

1 hour ago, jumungo4 said:

Yeah I can see the windows very lightly on the screen in the dark.

 

Does the brightness need to be turned up or is it the backlight that has gone?

Adjust the brightness and if that does not work, back light has prob gone out.

[jumungo4]

3 minutes ago, techbeck said:

Adjust the brightness and if that does not work, back light has prob gone out.

Do you know which buttons to press?! very hard to see!

[techbeck]

13 minutes ago, jumungo4 said:

Do you know which buttons to press?! very hard to see!

Depends on your monitor make/model.  I would think you could find a manual online.  Also, should be software adjustments in the Mac OS or keyboard key combos.

[xendrome]

18 minutes ago, jumungo4 said:

Do you know which buttons to press?! very hard to see!

If you can't see the monitor control UI, then your backlight is gone.

[techbeck]

16 minutes ago, xendrome said:

If you can't see the monitor control UI, then your backlight is gone.

Good point.  I need more coffee..haha

[Mindovermaster Global Moderator]

External monitor still under warranty? If not, you can get a new screen for cheap.

 

Just tell us the model number of your screen. Looks like an Acer.

[jumungo4]

4 minutes ago, Mindovermaster said:

External monitor still under warranty? If not, you can get a new screen for cheap.

 

Just tell us the model number of your screen. Looks like an Acer.

Acer S240HL

[techbeck]

4 minutes ago, jumungo4 said:

Acer S240HL

https://images-eu.ssl-images-amazon.com/images/I/B1P8oh22d3S.pdf

 

Start on page 18.  But as already noted, if your backlight is dead, which is the way it sounds, then you will not see a menu display on the monitor.

[Mindovermaster Global Moderator]

23 minutes ago, jumungo4 said:

Acer S240HL

Monitor is around 100 USD on eBay. So, if it isn't under warranty, just ditch it. It's not worth repairing. You'd spend as much money for a new one than repairing it...