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5.5. Error Messages and Troubleshooting
Test classification Screen display test items Contents Possible damaged or faulty part
1
A20 GATE TEST Address 20 line
2
CACHE ON/OFF TEST Cache memory on/off
3
NPU OPERAND TEST Floating point processor function
4
RAM
(Memory related)
RAM STANDARD Memory standard Main board
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
RTC 12/24 HOUR TEST Real time clock test
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 Main board
17
PS/2 MOUSE REG. Mouse Main board
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 Main board
Card Bus REG Card Bus port Main board
USB REG USB port Main board
22
VGA ALL TEST VGA LCD, main board, cable
23
SVGA RAM TEST SVGA RAM Main board
24
VESA MODE TEST VESA mode LCD, main board, cable, connector
25
FD WT/RD/WP TEST FD write/read/write protection FD, main board, cable
26
HDD ALL TEST Only HDD lead selected HDD, main board, cable, connector
27
ECP REGISTER R/W Parallel port Main board, cable, connector
28
EPP REGISTER R/W Parallel port Main board, cable, connector
29
EXT. CMOS R/W TEST Extension CMOS R/W test Main board
COMMUNICATION Main board
DISK
(FDD/HDD)
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.
UNIQUE
(Individual
functions)
VIDEO
(Display related)
IO
(Input-output)
CONTROL
(Control ICs on the
main board, etc.)
CPU
(CPU related)
Main board
Main board
21
AUX
(Auxiliary functions)
30