T3400/T3400CT Maintenance Manual
❑ If error message (18) is displayed, go to the Keyboard Troubleshooting
Procedures in Section 2.7.
❑ If error message (21) or (22) is displayed, go to the HDD Troubleshooting
Procedures in Section 2.6.
❑ If error message (23) or (24) is displayed, go to the FDD Troubleshooting
Procedures in Section 2.5.
(1) TIMER CH.2 OUT ERROR
(2) PIT ERROR
(3) MEMORY REFRESH ERROR
(4) FIRST 64KB MEMORY ERROR
(5) RTC ERROR
(6) CRTC ERROR
(7) VRAM ERROR
(8) KBC 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) KEYBOARD ERROR
(19) KBC ERROR
(20) HDC ERROR
(21) HDD #0 ERROR
(22) HDD #1 ERROR
(23) NO FDD ERROR
(24) FDD ERROR
(25) TIMER INTERRUPT ERROR
(26) RTC UPDATE ERROR