Screen disappears after reboot!

September 1, 2017 at 11:09:28
Specs: Windows 8
I have recently installed a new Samsung tv as a display monitor for a Acer pc.

On start up the tv does not see the pc and I cannot get a picture.

When I plug my old monitor in I can get the display back and I am then able to unplug the HDMI cable and install the new monitor and then I can get a display

Once I switch the computer off or restart I lose the display again and have to go through the same process as above to fix it.

This happens every time and I am unable to find a fix...
Any help would be greatly appreciated


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#1
September 1, 2017 at 18:04:53
Acerpcman,

Someone who has experienced a problem like yours should be
able to tell you what you need to do to fix it right away, but it is
possible that no such person will come along any time soon, so
I'll try to help you figure it out.

Are you using the same HDMI cable for both the old monitor
and the new TV? So what you do is turn off the monitor, unplug
the HDMI cable from it, plug it into the TV, and turn the TV on?

If not, what cables do you use?

Do you have the instructions for the new Samsung TV which
explain how to connect the TV to a computer and set it up for
the first time? What you need to know could be in there.

What are the Windows video settings for screen resolution
and refresh rate?

I don't have Windows 8, but do have Windows 10. It has a lot
of things to click on regarding video sttings. Most of them are
just different ways to get to the same place, but there are still
a fair number of settings to adjust. I suggest that you look at
everything you can find (if you haven't already) and note any
settings which might possibly be relevant. Be careful about
actually changing them, of course. At minimum, write down
what the setting was before you change it.

I also have an old Windows 98 SE laptop. It has some video
settings that seem very relevant. On the "Monitor" tab of the
video controller's dialog are three checkboxes:

- Monitor is Energy Star compliant
- Automatically detect Plug & Play monitors
- Reset display on suspend/resume

On that same page is a button to pop up a list of monitor
manufacturers and model numbers. Horribly out of date
now, of course, but it suggests that it is important for
Windows to have the correct info about the monitor.

On another tab is a selection for which display screen to
use: the built-in screen, an external monitor, or both.

Let us know what you learn.

-- Jeff, in Minneapolis


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#2
September 1, 2017 at 19:38:48
While TV and computer monitor displays may seem similar, there are very different protocols needed to make them work. HDMI needs a special security handshake before it will display the signal. Monitors with a display port don't. Most likely this is the issue you are having issues with.

The easiest solution would be to purchase a computer monitor that has a display port input.

message edited by THX 1138


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#3
September 2, 2017 at 04:03:26
THX 1138

Are you saying it is possible to get around the handshake by
hot swapping the monitor and TV?

-- Jeff, in Minneapolis

message edited by Jeff Root


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#4
September 2, 2017 at 04:33:37
If i start the pc connected to my old monitor it will display the screen with no problems. I then unplug the old monitor and plug in the new one and I can get a display on new monitor but only once windows is loaded. This will not work if it is still on start up mode.

Ive tried changing the resolution to every setting available but this has failed on all attempts


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#5
September 2, 2017 at 20:15:35
Hi Jeff, no I'm saying the computer he has may not be providing the correct handshake for HDMI.
Display ports are much more compatable for computer use.

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#6
September 2, 2017 at 22:10:06
But THX, he says the new TV does work for him if he plugs
it in after starting up with the old monitor. Doesn't that mean
he is getting around the handshake, if you are right that the
handshake is what is preventing normal connection?

-- Jeff, in Minneapolis


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#7
September 3, 2017 at 15:59:42
Maybe the HDMI on the computer monitor is set up correctly for the system to recognize it and activate the connection and while the TV cannot do this. The video is already active after boot up and then will work with the TV until it is shut down or put to sleep. This probably means that that particular TV (and probably many others) cannot be used as a primary monitor but as a secondary monitor or the issue will continue.
If the computer has a display port you may be able to use a Display Port to HDMI adapter to run to the TV and this might work but the Display Port does not support audio so separate speakers will be needed or a separate audio cable to watch videos or play games on it.

You have to be a little bit crazy to keep you from going insane.


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#8
September 3, 2017 at 20:33:05
he says the new TV does work for him if he plugs it in after starting up with the old monitor.

So I'm guessing that it could be a timing issue.


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