Garbled graphics in macos and setup screen

[darkaza]

I'm getting garbled graphics once osx gets to the login screen - see attachment pic.

the setup screen for mac os has little red squares all over it.

its a 2006 intel imac. 20"/2.16ghz/1gb/250gb

I've managed to strip it down to under the lcd and check all the cabling, all seems fine. same issue persists.

Any ideas as to whats wrong?

[darkaza]

should also mention txt in verbose mode looks perfect, and the default booting screen and blue background just before login look fine too.

[fryke]

i'd still say it's the graphics card...

[Giaguara]

Most likely. And the remaining possibility would be RAM.
Any error in looped, extended hardware test?

[darkaza]

tried different memory modules, same effect happens. graphics card looks to be built into the mainboard, so i guess thats the end of it then.

thanks for the replys anyway.