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Apple Hardware Test for PowerMac G4 has at least these version numbers (made 2000-2004):
1.2 , 1.2.1 , 1.2.2 , 1.2.3 , 1.2.4 , 1.2.5 , 1.2.6 , 1.2.7 , 2.0 , 2.0.1 , 2.0.2
This OVERVIEW link has All the AHT and other Test software here:
http://macintoshgarden.org/apps/apple-hardware-test-cds
AHT version 2.0.2 for PowerMac is stored here:
http://macintoshgarden.org/apps/apple-hardware-test-202-powermac-mdd
AHT for PowerMac G4 Cube is stored here:
http://macintoshgarden.org/apps/apple-hardware-test-powermac-g4-cube
Compatibility:
AHT is a Firmware program, it does NOT run on Mac OS.
Category:
Drivers & Hardware Support
Year released:
2000
Publisher:
Apple
System:
Mac OS 9
Mac OS X
Architecture:
PPC