Toshiba Tecra M2-S319 Maintenance Manual - Page 75

2.4 System Board Troubleshooting 2 Troubleshooting Procedures Table 2-5 Printer port LED boot mode status (2/7) LED Status (B7h) B9h 00h Test item Memory type check Initialization of cache Bus L2 configuration Permission of cache Prohibition of L2 cache Memory clear Setting of TASK_1ms_TSC FAN control Sound controller initialization (for beep) Controlling LED instead of display massage Key input (Key input is skipped when the BIOS is damaged) Reading CHGBIOS.EXE CHECK_SYSTEM Prohibition of cache Initialization of special register and Intel chipset PIT CH1 initialization Message Enabling system speaker setting Reading security status Reading policy (When reading error above is occurred, beep sounds every one second for thirty seconds) Sound beep FDC reset Setting of parameter for 2HD (1.44MB), transmission rate Reading first sector When using 2HD (1.44MB), go to Search of entry for CHGBIOSA.EXE Setting of parameter for 2DD (720KB), transmission rate Search of CHGBIOSA.EXE from route directory Calculation of directory start head, sector Reading contents of route directory by one sector Search of entry for "CHGBIOSA.EXE" from the sector read Reading of EXE header of "CHGBIOSA.EXE" key input when an error occurred Execute "CHGBIOSA.EXE"/"CHGFIRMA.EXE" (Setting refresh interval to 30ms) TECRA M2 Maintenance Manual (960-468) 2-21