iMac goes black when startup progress bar is about 1/3 of the way across.

There is no cursor.

Boot in safe mode also goes black.

Boot in verbose runs a bunch of lines and goes black.

Booting diagnostics (D) longer pause on grey screen before apple logo comes up.

Can boot in single user.

Booting from recovery goes black, but eventually voice says "to use English press the return key.

Mac is 24" older heavy aluminum 1 inch thick edges. Graphics card?

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