Toshiba Portege M100 Maintenance Manual - Page 60

2 Troubleshooting Procedures 2.4 System Board Troubleshooting 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. q If an error message is shown on the display, perform Check 1. q If nothing is displayed, go to Procedure 2. q If an operating system is properly loaded, go to Procedure 3. Check 1 If one of the following error messages displays on the screen, press the F1 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 configuration or when the data is lost. If you press the F1 key as the message instructs, the SETUP screen appears to set the system configuration. If any error message is displayed, perform Check 2. (a)*** Bad time function *** Check system. Then press [F1] key (b)*** Bad check sum (ROM) *** Check system. Then press [F1] key (c)*** RTC battery is low or CMOS checksum is inconsistent*** Check system. Then press [F1] key 2-18 PORTEGE M100 Maintenance Manual (960-452)