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2.12 Sound Troubleshooting 2 Troubleshooting Procedures
Check 2 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 (17), (24) or (25) appears, go to
Procedure 4.
If the error message (18) appears, go to the Keyboard Troubleshooting Procedures in
Section 2.7.
If the error message (19) or (20) appears, go to the HDD Troubleshooting Procedures
in Section 2.6.
If the error message (21) appears, go to the DVD-ROM and CD-RW/DVD-ROM
Troubleshooting Procedures in Section 2.9.
If the error message (22) or (23) appears, go to the FDD Troubleshooting Procedures
in Section 2.5.
(1) PIT ERROR
(2) MEMORY REFRESH ERROR
(3) TIMER CH.2 OUT ERROR
(4) CMOS CHECKSUM ERROR
(5) CMOS BAD BATTERY ERROR
(6) FIRST 64KB MEMORY ERROR
(7) FIRST 64KB MEMORY PARITY ERROR
(8) VRAM 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) IDE #0 ERROR
(21) IDE #1 ERROR
(22) NO FDD ERROR
(23) FDC ERROR
(24) TIMER INTERRUPT ERROR
(25) RTC UPDATE ERROR
Satellite A20 Maintenance Manual (960-444) 2-21