imac with strange artifacts when turning on it

[highpulse]

its a 20inches , a1224 imac , dual core , with MCP chipset only and cpu.
what happens is that once i turn on , backlight is on , and see like pixel size dots everywere , after a while he get into windows , but we notice for sure , image is not correct or ok at all , but once i hibernate and than if i wake it up image is perfect ... once i shut down and turn on again , image is crazy again.

what are you taughts ?

thk in advance

[lefos]

Re: imac with strange artifacts when turning on it

Hello,

My guess is on that chipset. Can you tell us its number?MCP...?

[dellxps15]

Re: imac with strange artifacts when turning on it

it could be mcp67mv-a2

[lefos]

Re: imac with strange artifacts when turning on it

My thoughts were on that too..If it is that one then change it to be sure