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Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

:::weird white screen plus staircase colored flickering dots??:::


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gaby1088

 
Member Since: Feb 25, 2011
Posts: 4
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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."

[IMG]

Uploaded with ImageShack.us[/IMG]
TIA,
Gabe.
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chscag

 
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Member Since: Jan 23, 2008
Location: Fort Worth, Texas
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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.
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gaby1088

 
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i think im going to have to buy the monitor adapter because i dont think the computer came with it. :/
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gaby1088

 
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bump, havnt had time to take it in.
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robduckyworth

 
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Member Since: Jan 04, 2011
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that is a tell tale sign of a broken graphics processor, as chscag says.

If you find a post helpful, don't forget to use the reputation system (top right of post.)
Join us in the IRC! How? Add me on Steam, Origin or PSN (Vita): robduckyworth
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