Toshiba TECRA A8 series Maintenance Manual page 71

2.4 System Board Troubleshooting
Check 3
TECRA A8 /Satellite Pro A120 Maintenance Manual (960-573)
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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 one of the following error messages (1) through (15), (20) or (21) appears, go to
Procedure 4.
If the error message (16) appears, go to the Keyboard Troubleshooting Procedures
in Section 2.7.
If the error message (17) or (18) appears, go to the HDD Troubleshooting
Procedures in Section 2.6.
If the error message (19) appears, go to the Optical Drive Troubleshooting
Procedures in Section 2.9.
(1) PIT ERROR
(2) MEMORY REFRESH ERROR
(3) TIMER CH.2 OUT ERROR
(4) FIRST 64KB MEMORY ERROR
(5) FIRST 64KB MEMORY PARITY ERROR
(6) VRAM ERROR
(7) SYSTEM MEMORY ERROR
(8) SYSTEM MEMORY PARITY ERROR
(9) MEMORY ERROR
(10) EXTENDED MEMORY PARITY ERROR
(11) DMA PAGE REGISTER ERROR
(12) DMAC #1 ERROR
(13) DMAC #2 ERROR
(14) PIC #1 ERROR
(15) PIC #2 ERROR
(16) KBC ERROR
(17) HDC ERROR
(18) Built-in HDD ERROR
(19) CD-ROM ERROR
(20) TIMER INTERRUPT ERROR
(21) RTC UPDATE ERROR
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2 Troubleshooting Procedures
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