Symptoms of a graphic card failure ?


as wrote imac dying/dead.
cannot hardware test phase pressing d i'm wondering if symptoms might "prove" it's graphic cards having gone west.
right imac 27 (late 2009) boots chime, apple logo, spinning gear stops , i'm left imac apple logo , faint noise of hdd doing business.
have discovered can ping , connect via ftp , files there.
login screen never comes up.

since warning signs of failure freezes of gui save mouse pointer freely moving wonder if it's graphics components.

apple try fix since guarantee long expired or need throw away ?

 



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