Part numbers:
620S00486, 640S01399, 641S01000, 960K59228, 960K72100, 960K72101, 960K72102

Replacement Recommendations:
Unit boots to green screen and then returns to energy saver screen and cycles back and forth.
USB or network connectors are not getting recognized.
Machine freezes as soon as you push the power on switch.

Compatible models:
Phaser 7800DN
Phaser 7800DX
Phaser 7800GX