Toshiba Satellite L550 series, Maintenance Manual

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3. Tests and Diagnostics
Satellite L550/ Satellite L555/ Satellite L557/ Satellite ProL550 Series T&D 18
NOTE: The Touch Pad test cannot be used to test an external USB mouse.
The Touch Pad button subtest allows users to test their Touch Pad buttons. If the buttons are
clicked, the cursors should appear in the corresponding box of the button figure that is displayed
on the screen as below.
After checking T/Pad buttons and cursor’s function, use “Tab” key or use T/Pad cursor to click
the “OK” column will end this test.
It will indicate whether the subtests pass or fail after three questions.
NOTE: The above figure has three compartments although the Touch Pad installed may
only have two buttons. In this case, the central compartment in the figure does not
correspond to any button.
3.11 LCD Pixels Mode Test
This LCD pixels mode test checks whether video display is fine.
This test includes two modes of the test:
1. Text Mode
- including 40*25 (16 colors) and 80*25 (2/16colors).