Pio Loopback Test - Toshiba Satellite P20-25 Series Maintenance Manual

3. Tests and Diagnostics
3.5

PIO Loopback Test

The PIO loopback test will check below items through PIO loopback connector.
External Interrupt
External Loopback
- including Pattern test, Data Pin test, Control register test & Control pin/ Status
pin test.
NOTE: Remember to connect a PIO loopback connector to the computer's printer port
before test begins.
The screen should display as below, indicating whether the test is passed or failed when
finished.
3-8
3.5 PIO Loopback Test
Satellite P20-25 Series Maintenance Manual