Recently, when I'm browsing the internet with white background, I started to notice that my monitor sometimes make these 1~2 small black/discolored horizontal lines in the middle of my screen for a few seconds and it disappears.
The line is not through my whole screen at all. It is only 1~2 inches long and appears only 2~3 seconds too. And happens rarely too. However, I do not know if this is my monitor problem or graphics problem.
I recently overclocked my graphics card.
I had my monitor for more than 5~6 years. For the past 6~7 months it started to make these 'clicky' or 'popping/cracking noise' even when I was not using the monitor, so I thought my monitor was dying...
So could the 'black line' be cause by monitor or graphics card? Which one do you think it is?