Toshiba PORTEGE M400 - Manual (Page 212)

3 Tests and Diagnostics 3.30 Sound Test program
3-94 [CONFIDENTIAL] PORTEGE M400 Maintenance Manual (960-541)
Subtest02 English Narration
Selected this subtest, narration in English starts.
For more details on the procedure, refer to the subtest01.
Subtest03 Test Tone A
CAUTION: Before starting subtest03, be sure to set the sound at proper volume.
This subtest plays sine wave while changing its table from 100Hz to 20Hz.
Return to the CD Sound (Standard) menu after the test ends.
Subtest 04 Test Tone B
This subtest plays sine wave while changing its table from 400Hz to 3KHz
and also changing the channel from left speaker to right speaker.
Return to the CD Sound (Standard) menu after the test ends.