129
8575
8575
A N/B Maintenance
A N/B Maintenance
8.2 No Display
No Display
Replace monitor
or LCD.
Board-level
Troubleshooting
Yes
No
Monitor
or LCD module
OK?
System
BIOS writes
error code to port
378H
?
Yes
No
Refer to port
378H
error code description
section to find out
which part is causing
the problem.
Make sure that CPU module,
DIMM memory are installed
Properly.
Display
OK?
Yes
No
Correct it.
To be continued
Clock and reset checking
Check system clock and reset
circuit.
Replace
Motherboard
1.Try another known good CPU
module, DIMM module and BIOS.
2.Remove all of I/O device (FDD,
HDD, CD-ROM…….) from
motherboard except LCD or monitor.
Display
OK?
1. Replace faulty part.
2. Connect the I/O device to the
M/B one at a time to find out
which part is causing the problem.
Yes
No
There is no display on both LCD and VGA monitor after power on although the LCD and monitor is known-good.