green dots on my background

[ramamak]

I have this issue since a year and never had seen it around on mac forums. So when I play a movie or even grabbing a window around the screen these tiny green-blue dots appear and disappear randomly, sometimes they line up vertically. The smaller is the movie size playing in quicktime (even in youtube) the bigger are the dots. The good thing is I see them while working with pictures in photoshop, but they don't affect the picture quality when I save them in jpg or other formats.
and the position of these dots change depending on the background picture
i try the hardware test and no problem
plz any help
thanks

 

[cubeeggs]

You’ve had this issue for a year? Is your MacBook under warranty?

It sounds like a video card or problem. If the graphics accelerator itself is bad, you need a new logic board, which is expensive if your computer’s not under warranty.

You didn’t specify which Mac you have. I think all MacBooks use graphics memory shared with the main memory, so you could try testing your memory with this tool:

http://www.memtest.org/

but you said your Mac passes the hardware test, and if your RAM was bad you would probably be having other problems, so it’s likely a logic board issue.

 

[ramamak]

thanks a lot for ur reply
but i m not under warranty.
and i have macbook 4
and this tool i don't know how to execute it

http://www.memtest.org/
can u please tell me which one to download and how to execute it

thanks a lot

 

[cubeeggs]

Download this, decompress it to get the ISO, and use Disk Utility to burn it to a CD-R:

http://www.memtest.org/download/4.10/memtest86+-4.10.iso.gz

 

[ramamak]

thanks a lot
but then what to do when i burn it to CD

 

[ramamak]

thanks a lot for ur advice
i try it but it pass and no error appear
so what is the problem u think???????
and by the way i try my Disk utility program and it doesn't work
burn the CD successfully but when i open it i don't find any thing
thank you