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5.5 . Error Messages and Troubleshooting
Test classification Screen display test items Contents
1
A20 GATE TEST Address 20 line
2
CACHE ON/OFF Cache memory on/off
3
NPU OPERAND TEST Floating point processor function
4 RAM (Memory related)
RAM STANDARD Memory standard
5
DMA PAGE REG TEST DMA page register
6
DMA REGISTER TEST DAM register
7
DMAC Transfer TEST DAM transfer test
8
PIC HALT INSTRUCTION TEST Interrupt controller
9
PIC REGISTER TEST Interrupt controller
10
RTC CMOS RAM TEST Real time clock CMOS
11
12
SPEAKER TEST Speaker
13
PIT CH0 TEST Interrupt timer CH0
14
PIT CH1 TEST Interrupt timer CH1
15
PIT CH2 TEST Interrupt timer CH2
16
KEYBOARD REG TEST Keyboard
17
PS/2 MOUSE REG Mouse
18
SERIAL WRAP TEST Serial loop back (jig required)
19
SERIAL ALL INTERNAL TEST Serial port
20
PARALLEL REGISTER R/W Parallel register
PCIC ALL TEST PCIC
Card Bus REG Card Bus port
USB REG USB port
22
VGA ALL TEST VGA
23
SVGA RAM TEST SVGA RAM
24
VESA MODE TEST VESA mode
25
FD WT/RD/WP TEST FD write/read/write protection
26
HDD ALL TEST Only HDD lead selected
27
ECP REGISTER R/W Parallel port
28
EPP REGISTER R/W Parallel port
29
EXT. CMOS R/W TEST Extension CMOS R/W test
COMMUNICATION
IO
(Input-output)
CONTROL
(Control ICs on the
main board, etc.)
The table below explains the parts that may be faulty or damaged should an error message occur while performing the
various test items of the self diagnostics program.
CPU
(CPU related)
21
AUX
(Auxiliary functions)
DISK
(FDD, HDD)
UNIQUE
(Individual functions)
VIDEO
(Display related)
5-6