System Board Troubleshooting Procedures; Procedure 1 Message Check; Procedure 2 Printer Port Led Check - Toshiba T3300SL Maintenance Manual

2.4 System Board Troubleshooting
Procedures
To determine if the system board is defective or not functioning properly, perform the following
procedures beginning with Procedure 1 and continuing with the other procedures as instructed.
Procedure 1: Message Check
Procedure 2: Printer Port LED Check
Procedure 3: Diagnostic Test Program Execution Check
Procedure 1 Message Check
When the power is turned on, the system performs the Initial Reliability Test (IRT) installed in the
BIOS ROM. The IRT tests each IC on the system board and initializes it.
If an error message is displayed, perform Check 1. If not, go to Procedure 2. If MS-DOS is prop-
erly loaded, go to Procedure 3.
Check 1 If the following error message is displayed on the screen for one second, the external
FDD is not connected, even though the external FDD/PRT option in the SETUP pro-
gram is set to FDD A. Set the external FDD/PRT option to FDD B or PRT, or connect
the external FDD and restart the system. If any other error message appears, perform
Check 2.
Check 2 If one of the following error messages is displayed on the screen, press any key as the
message instructs. These errors occur when the system configuration preserved in the
RTC memory (CMOS-type memory) is not the same as the actual one or the data is
lost.
If you press any key as the message instructs, the system configuration in the RTC
memory configuration is set to the default setting. If error message (b) appears often
when the power is turned on, replace the RTC battery. If any other error message is
displayed, perform Check 3.
(a)
(b)
2-12
*** FDD A is not installed ***
*** Error in CMOS.
Check system.
*** Error in CMOS.
Check system.
Bad HDD type ***
Then press any key ......
Bad battery ***
Then press any key ......