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gaby1088 02-25-2011 07:33 PM

:::weird white screen plus staircase colored flickering dots??:::
whats up everyone. this is my first post here on mac forums. I have this issue with my 4 year old 17inch imac. I tried doing some research on the issue but i cant find my specific one. When i turn on the comp i just had a white screen. Then after some recommendations i reseted the memory by doing command option RP. Then these staircase colored flashing dots started happening but in the background i see the OS booting up. Once it finishes booting up i have a white screen and I cant see anything other than a white backdrop and the staircase colored lines.

here is a picture for reference: I really appreciate any advise!!
this picture is of the computer already "loaded."


Uploaded with[/IMG]

chscag 02-25-2011 09:43 PM

It looks like a graphics processor problem. Try attaching an external monitor to your iMac and see if the same thing happens. If you don't have a spare monitor, a TV can be used. Post back the results and we can go from there.

gaby1088 02-27-2011 11:48 AM

i think im going to have to buy the monitor adapter because i dont think the computer came with it. :/

gaby1088 03-31-2011 12:05 PM

bump, havnt had time to take it in.

robduckyworth 03-31-2011 12:37 PM

that is a tell tale sign of a broken graphics processor, as chscag says.

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