Erratic recognition of monitor HDMI in AO756 for external display on a monitor Acer X233H

I have a laptop 756-2887 Aspire One that I'm trying to connect to an external monitor with a monitor Acer X233H using HDMI.  Sometimes it connects without effort and I am able to set up a beautiful double external screen to the laptop using the external analog and HDMI display.

But sometimes the HDMI display goes on a cycle where it recognized and then down and then is recognized again and it happens over and over again.  In this cycle, a never displays on the monitor.

I tried to turn on/off things and I can't recognize a pattern that allows to connect me with reliability the HDMI monitor.  The monitor works fine with my desktop and I can plug HDMI with DVI connection show desktop.  The monitor detects a HDMI connection and gives me the computer screen, unless it goes into the cycle of decline.

Using the Fn keys to change display options did not help either.  Connect an external analog never present the same problem.

Here is what happened.

I remembered that during the first time that I managed to successfully install the external HDMI monitor was when I got another second monitor installed as the external VGA monitor.  My hope was therefore a plan of double external monitor to my laptop and I was very impressed that this was possible.

So I tried to go back to the other external VGA monitor an old HP f70 and it worked!  I was able to correctly connect the HDMI monitor and the f70 to the laptop.  The VGA monitor who did cooperate with the HDMI is Samsung SyncMaster 931 b.  I had also used this Samsung to connect to a DVI port on a desktop computer, and he had therefore two connected cables, DVI and a VGA of the notebook.  I tried to unplug the DVI cable and connecting the VGA and HDMI monitor to the laptop and it worked.  The HDMI monitor display.

I went to Samsung and got the drivers for this monitor and I find that after installing the drivers, you have the option to install a digital display or analog monitor.  As I was going to just to use the VGA connection, I chose analog.  After you have installed the driver for the Samsung, I was able to plug both the cable DVI and VGA cable on the Samsung and still be able to display on the monitor HDMI.

The solution was to install the drivers for the analog port of the Samsung monitor.  Who would have done it.  I guess I should have suspected the two cables coming from the Samsung monitor could have done things.

JackE, thanks for keeping me with your encouraging messages.

Tags: Acer

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