VGA makes screen blank!

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amiee123

Thread Starter
Joined
Nov 5, 2011
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1
Hello there,

I literally bought a vga cable to scart today to connect my laptop to my tvs. firstly when i plugged it in a box came up on screen i don't have a clue how to get it up again now because it only came up that one time and im sure i clicked mirror or something to do with the monitor or what not. but in all honesty i cant remember anything else about that box... anyway nothing came up on my tv screen so i unplugged and plugged in again. still no success. i then found output graphics options when i right clicked on my desktop which allowed me to select a few output options i tried a different one and now every time i plug in the vga cable my monitor goes blank. but i sometimes manage to change the options just before the screen goes blank again on start up.... i just have no idea what i'm doing at all. i thought it would be a simple process of just choosing a different resolution at most and plug and play. But it hasn't and its just been a headache but there's no way i can see my screen when the vga is plugged in until ive unplugged it again. it completely switches off the screen.

Please help i don't fancy having to take my pc to the computer shop :( thank you
 

cwwozniak

Chuck
Moderator
Joined
Nov 28, 2005
Messages
68,905
Hi amiee123, and welcome to TSG.

Are you able to get a usable display on the laptop's screen if you power it up with nothing connected to the VGA port? If not, see if the keyboard has any kind of function key to cycle between the internal and external display.

If you you are able to get the built-in display working, do not connect anything to the VGA port until you check a few things.

First check the TV specifications to to see if it supports separate red, green and blue (RGB) analog video through the SCART port. If it does, you next have to check if it supports any type of non-interlaced video format typically used by computers. If it does, it will be a matter of finding out if the video controller in the laptop can output any of those video formats.

If the TV does not support any kind of non-interlaced RGB computer video format, you would next need to find out if the video controller in the laptop can output RGB video with interlaced TV signal timing (NTSC, PAL, SECAM, ec.). If it does not, then you will not be able to display the computer's output on your TV using any kind of simple VGA to SCART cable. You would need some type of scan converter box that can change the video timing.
 
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