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
