Troubleshooting
69
GMB-C2165-LLVA User
‟
s Manual
properly and correctly accommodating these modules and devices, it is very
possible
to encounter system failures that result in malfunction of any device.
To make sure that you have a successful start with GMB-C2165-LLVA , it is
recommended, when going with the boot-up sequence, to hit “DEL”
key and enter
the BIOS setup menu to tune up a stable BIOS configuration so that you can wake up
your system far well.
Loading the default optimal setting
When prompted with the main setup menu, please scroll down to “Load Optimal
Defaults”, press “Enter”
and “Y”
to load in default optimal BIOS setup. This will
force your BIOS setting back to the initial factory configuration. It is recommended
to do this so you can be sure the system is running with the BIOS setting that
CONTEC has highly endorsed. As a matter of fact, users can load the default BIOS
setting any time when system appears to be unstable in boot up sequence.
Improper disable operation
There are too many occasions where users disable a certain device/feature in one
application through BIOS setting. These variables may not be set back to the original
values when needed. These devices/features will certainly fail to be detected.
When the above conditions happen, it is strongly recommended to check the BIOS
settings. Make sure certain items are set as they should be. These include the COM1/
COM2 ports, USB ports, external cache, on-board VGA and Ethernet.
It is also very common that users would like to disable a certain device/port to
release IRQ resource. A few good examples are
Disable COM1 serial port to release IRQ #4
Disable COM2 serial port to release IRQ #3
Etc…
A quick review of the basic IRQ mapping is given below for your reference.
Interrupt Request Lines IRQ
IRQ#
Current Use
Default Use
IRQ 0
Unused
System Timer
IRQ 1
System ROM
Keyboard Event
IRQ 2
【
Unassigned
】
Usable IRQ
IRQ 3
System ROM
COM2
IRQ 4
System ROM
COM1
IRQ 5
【
Unassigned
】
Usable IRQ
