System Test - Toshiba A20-S259 - Satellite - Pentium 4 2.66 GHz Maintenance Manual

3 Tests and Diagnostics
3.4

System Test

To execute the System Test select 1 from the DIAGNOSTIC TEST MENU, press Enter and
follow the directions on the screen. Move the highlight bar to the subtest you want to execute and
press Enter.
Subtest 01 ROM Checksum
This subtest executes a checksum test of the BIOS ROM on the System Board.
Subtest 02 Thermister Check
This subtest reads the status (normal/open/short) of the [Thermister connect check]
of the PS micon. When it is not normal, an error message is displayed. When it is
normal, the display returns to the main menu.
Subtest 04 CPU Fan On/Off
This subtest checks CPU fan operation using the on/off command. The following
message will appear when this subtest is executed. Make sure the fan does not
rotate and press Enter.
Test CPU Fan Revolution 0000RPM Start
The following message will appear. Make sure the fan rotates at high speed and
press Enter.
Test CPU Fan Revolution LEVEL 5 speed start
Subtest 05 2nd Fan On/Off
This subtest checks 2nd fan operation using the on/off command. The following
message will appear when this subtest is executed. Make sure the fan does not
rotate and press Enter.
Test 2nd Fan Revolution 0000RPM Start
The following message will appear. Make sure the fan rotates at high speed and
press Enter.
Test 2nd Fan Revolution LEVEL 5 speed start
Subtest 06 Quick charge
This subtest checks the status for the quick charge.
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Satellite A20 Maintenance Manual (960-444)
3.4 System Test