Today i was browsing the web when my screen started flashing violently. Instinctivly i THOUGHT the monitor has done something again and shut it down (only the monitor). When I turned it on again a few seconds later my computer was alterady auto-rebooting and started again normaly. Everything is back to normal.

Should I be worried?Many times vid problems are due to excessive heat...
DLoad and install SpeedFan...Free...then post all your temps here...
I know and I have speedfan. That was the first thing the I thought of. All temperetures were at idle levels for my hardware (checked like 5 minutes after).
Having a Radeon GPU makes you check this stuff regularly.

Why do I think i asked here?Sorry i didn't assume you already had SpeedFan and a Radeon GPU....neither of which were mentioned in your Post...My bad.Sorry about that. It's just the way your wrote that in your post (like talking to a 5 year old) that made me mad. No hard feelings?

Also un update on the issue:
A simmilar thing occured today (the same circumstances) but the result was a blue screen. Its so funny that i've replaced about 4 gpu's in this pc (mostly still in warranty) but the 7 year old Vista install is still working. MAYBE now it't close to dying now as this is the first time it gave me a bluescreen...Hi

Your problem could be any one of a lot of things. Without you giving the following information it would all be speculation.

It would help if you could give the make and model of motherboard, power supply, monitor, graphics card and there approximate age.

If you would like to take some photos of the inside of the computer and post them, it would help as well.

Also check if there has been any driver updates installed.

Thank you

   
I gave direct advice...if you felt like a 5 year old i apologise...
Lisa_maree
Alright, heres the data (and thanks in advance ):

-GPU: AMD Radeon HD 7750 2GB GDDR3 Sapphire / Age: 11 months (upgraded)

-PSU: 600W LC-Power LC600H-12 120mm / Age: 11 months (the gpu requred more power)

-Motherboard: Pegatron Corporation 2A73H Mainboard / Age: 5 years (now that i checked it seems i've overestimated a bit before - for the OS)

-A NEC monitor running 1600x1200 (yeah i know) / Age: 5 years

Photos may be a bit harder to get since i have like 2 million cables plugged in and the side that opens is against the wall. Maybe I should go clean the dust by now though...

The drivers had some problems a few months ago so I had to totaly delete them and REINSTALL catalyst (current version: 13.4)Thank you for that list.

Could you visually check the motherboard for failing capacitors or over heating ?

If the computer is dusty then it would help if you kept ed it free of dust. This maybe as easy as cleaning out the present dust and shifting it ONTO a clean desk.

I know you have only recently brought the power supply but there are better supplies you could get. And the flickering is most likely an overloaded power supply.  Or noisy power hence the suggestion to check the capacitors on the motherboard.

Could you remove the graphics card and use the onboard this would isolate the monitor causing the problem. If the flickering goes away then and everything else checks ok then you would need to get the power supply replaced, a certified AMD supply would insure that the supply will work with your card.   Well its hard to test what is causing this since it's only happened twice a time period of like 14 days. Also I have a Core2Duo CPU, no onboard GPU so that plan's out. I'm going to clean it, reinstall the drivers and report back if it happens again. Thank you for your time.