Toshiba PORTEGE M400 Maintenance Manual page 66

2 Troubleshooting
Check 3
2-18
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The IRT checks the System board. When the IRT detects an error, the system stops
or an error message appears.
If error message (18) is displayed, go to the Keyboard Troubleshooting Procedures
in Section 2.7.
If error message (19), (20) or (21) is displayed, go to the 2.5" HDD
Troubleshooting Procedures in Section 2.6.
If error message (22) is displayed, go to the USB 3.5" FDD Troubleshooting
Procedures in Section 2.5.
If error message
RAID-0 is CRITICAL
go to the 2.5" HDD Troubleshooting Procedures in Section 2.6.
If any other error message is displayed, go to Procedure 2.
(1)PIT ERROR
(2)MEMORY REFRESH ERROR
(3)TIMER CH.2 OUT ERROR
(6)FIRST 64KB MEMORY ERROR
(7)FIRST 64KB MEMORY PARITY ERROR
(8)VRAM MEMORY ERROR
(9)SYSTEM MEMORY ERROR
(10)SYSTEM MEMORY PARITY ERROR
(11)EXTENDED MEMORY ERROR
(12)EXTENDED MEMORY PARITY ERROR
(13)DMA PAGE REGISTER ERROR
(14)DMAC #1 ERROR
(15)DMAC #2 ERROR
(16)PIC #1 ERROR
(17)PIC #2 ERROR
(18)KBC ERROR
(19)HDC ERROR
(20)Built-in HDD ERROR
(21)Select Bay HDD ERROR
(22)No FDD ERROR
(23)TIMER INTERRUPT ERROR
(24)RTC UPDATE ERROR
PCI Express error
PROTECTED MODE ERROR
CPU EXCEPTION ERROR
KEYBOARD ERROR
FDC ERROR
Exception ERROR
RAID-0 is CRITICAL
RAID-1 is DEGRADE
[CONFIDENTIAL]
2.4 System board Troubleshooting
or
RAID-1 is DEGRADE
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