Texas Instruments 4000M - Manual (Page 243)

Monochrome Adapter Test
Attribute
test
Character test
Text test
Memory test
Color Graphics Adapter Test
Attribute
test
Character test
Text test
Page test
Graphics
test
Background test
Memory test
EGA Adapter Test
Attribute test
Character test
Text test
Page test
Graphics
test
Background test
Memory test
VGA Adapter Test
Attribute test
Character test
Text test
Page test
Graphics
test
Background test
Memory test
Parallel Port Test
Internal
loopback
Printed pattern (requires connected printer)
External loopback (requires loopback connector)
Diagnostics
Diagnostics D-5