Toshiba M500 ST5405 - Satellite - Core 2 Duo 2.13 GHz Maintenance Manual page 153

3.16 Expansion Test
Subtest 02 RGB monitor ID
NOTE: To execute this subtest, an external monitor with monitor ID function is required.
Connect the external monitor to the PC for the test of ID acquisition.
The judgment of acquisition is based on the panel data. In simultaneous
display mode or internal display mode, in which the panel data is acquired,
this subtest will fail. Therefore, make sure only the external display is selected
when executing this subtest.
PORTÉGÉ M500 Maintenance Manual (960-559)
3 Tests and Diagnostics
[CONFIDENTIAL] 3-33