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Debug Code Action
POST (hex)
00 - > C1 - > C3 - >
25
Stopped at 25
00 - > C1 - > C3 - >
26
Stopped at 26
C3 - > 25 - > 26 - >
41
Stopped at 41
Power on - > Stopped at 50
50
BIOS Program Definition
Enumerating PCI bus number.
Assigning memory & I/O resource -
searching for a valid VGA device &
VGA BIOS then placing it in C000:0.
Initializing display card.
Initializing onboard clock generator.
Disabling respective clock resource
to empty PCI & DIMM slots.
Initializing onboard PWM3.
Initializing onboard H/W monitor
devices.
Initializing the FDD device.
Initializing USB devices.
Possible Cause
1. Incompatible PCI devices.
2. Incompatible USB devices.
3. Defective graphics card.
(VGA BIOS did not initialize)
4. The graphics card was not installed
properly.
1. Defective graphics card.
2. Initialized wrong BIOS process.
(Clock-gen circuit / Super IO
circuit)
Detected floppy error.
* Mixed-up BIOS data could be one
of the causes too.
1. USB failed to boot. (BBS issue)
2. Incompatible USB devices.
Solution
1. Remove all PCI/PCIE devices and
leave only the graphics card to test
first. Test the devices one at a time to
determine the one with problem.
2. Remove all USB devices including
the USB keyboard and instead use a
PS/2 keyboard to test.
3. Replace the graphics card.
4. Remove and reinstall the graphics
card.
1. Replace the graphics card.
2. Clear the CMOS data.
Unplug the FDD cable and check for
errors or check the BIOS settings.
* Replace a new BIOS chip.
1. Clear the CMOS data first.
2. Try connecting the device to another
USB port.
3. Test the USB devices one by one.
4. Set the USB power source to 5V by
means of the 5V/5Vsb select jumper.
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