I have a fairly average boring x 64 based PC with an i3 processor running Windows 7
Increasingly frequently (every hour or so) the picture on the monitor suddenly turns grey and fuzzy, (can still see whatever is on the screen, it's just tinted grey) there are a series of red and blue thin vertical lines across the picture and most notably there is a loud white noise kind of sound. Turning down the volume controls on the speakers or the pc makes no difference.
This last for about 15 seconds, the monitor shuts into standby and the sound disappears.
The computer itself does not shut down
After about a further 10 seconds I turn the monitor back on and everything is fine, the webpage or whatever is still there.
It happens whether I'm on the internet or just doing stuff on the pc e.g. word processing.
Thanks in advance!
ps: posted on internal hardware because I'm assuming that's the problem....could be wrong!