Hello

I have some computer problems. So the problem is a random black screen. This happens when I go to resolution settings and without changing anything the computer goes black. All other things work music and so on. To solve this I just do alt+tab a few times and it goes to normal. Some times it happens randomly when Im on internet.
I have tried a smaller monitor and it works fine. I got a new 24in monitor and the same black screen all over again. Im thinking GPU but Im not shure.
Can anyone help me. (Sorry for bad english)What resolution are you using between the monitor that has no problems and the one that does this black screen on you?

Is same video cable used for both monitors in your test?

What GPU or Video Card are you using so we know its limitations/normal operating parameters, as well as system specs including OS version?

If you run this larger display on a slightly lesser resolution than what you normally would run it on, does the problem completely go away?

*Also to note that if english is difficult, but your native language easier, Google has a free online translator to where you can type into one box in your native language and out in the other box next to it can pop out the english translation to make it easier if needed. You can then SELECT all in the english box and copy/paste it to here. But I had no problems reading what you stated, I just have a bunch of questions to get more info.  First, thank you for looking into my problem.
My current monitor is 1920x1080 (24in) this one is giving me problems, the other one that work fine is 1024x768 (17in). Small samsung syncmaster.
The cable was the same for both monitors.
If I change the resolution to really low some time it works some time it doesn't.
I had to mention that YESTERDAY I played some games with a friend and I get all settings on high and the game worked fine. when we finished, I tried changing the resolution and it worked without any problems. Today same story as before.

This are my system SPEC. If you need anything else I will get it for you.

Operating System : Windows 7 Home Premium 64-bit SP1
CPU : Intel Core I5 2400 (Code Name: Sandy Bridge..Package: Socket 1155 LGA)
RAM : 6GB
Motherboard : IPISB-CH2 (Chicago)

GPU:
ATI AMD Radeon HD 7700 Series
   Manufacturer: ATI
   Model: AMD Radeon HD 7700 Series
   Current Performance Level   Level 0
   Current GPU Clock: 300 MHz
   Current Memory Clock: 150 MHz
   Current Shader Clock: 150 MHz
   Voltage: 0.825 V
   GPU Clock: 1000.0 MHz
   Temperature: 35 °C
   Core Voltage: 0.825 V
   Driver version: 22.19.662.4
   BIOS Version: 113-C4680100-100
   Memory Type: GDDR5
   Memory: 2048 MB
   Bandwidth   72.0 GB/s
I have made a new discovery. So when the black screen happens if I move my mouse to the right bottom side where the "Go to desktop" button is then the desktop is visible. If i move away there is that black screen again. If I press the button it goes to normal unitil next BS.