Toshiba satellite A20 series Maintenance Manual page 71

2.12 Sound Troubleshooting
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)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
(25)
Satellite A20 Maintenance Manual (960-444)
PIT ERROR
MEMORY REFRESH ERROR
TIMER CH.2 OUT ERROR
CMOS CHECKSUM ERROR
CMOS BAD BATTERY ERROR
FIRST 64KB MEMORY ERROR
FIRST 64KB MEMORY PARITY ERROR
VRAM ERROR
SYSTEM MEMORY ERROR
SYSTEM MEMORY PARITY ERROR
EXTENDED MEMORY ERROR
EXTENDED MEMORY PARITY ERROR
DMA PAGE REGISTER ERROR
DMAC #1 ERROR
DMAC #2 ERROR
PIC #1 ERROR
PIC #2 ERROR
KBC ERROR
HDC ERROR
IDE #0 ERROR
IDE #1 ERROR
NO FDD ERROR
FDC ERROR
TIMER INTERRUPT ERROR
RTC UPDATE ERROR
2 Troubleshooting Procedures
2-21