POST (hex) |
| Debug Code Action |
| BIOS Program Definition |
| Possible Cause |
| Solution | |||
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25 | 00 | - | - | - |
| Enumerating PCI bus number. | 1. | Incompatible PCI devices. | 1. | Remove all PCI/PCIE devices and | |
> C1 | > C3 | > |
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| Stopped at 25 |
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| Assigning memory & I/O resource - |
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| leave only the graphics card to test | |||
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| first. Test the devices one at a time to | ||
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| searching for a valid VGA device & |
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| determine the one with problem. | |
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| VGA BIOS then placing it in C000:0. |
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| 2. | Incompatible USB devices. | 2. | Remove all USB devices including | |||
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| the USB keyboard and instead use a | |
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| PS/2 keyboard to test. | |
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| 3. | Defective graphics card. | 3. | Replace the graphics card. | |
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| (VGA BIOS did not initialize) |
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| 4. | The graphics card was not installed | 4. | Remove and reinstall the graphics | |
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| properly. |
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26 | 00 | - | - | - |
| Initializing display card. | 1. | Defective graphics card. | 1. | Replace the graphics card. | |
> C1 | > C3 | > |
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| Stopped at 26 |
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| Initializing onboard clock generator. |
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| 2. | Initialized wrong BIOS process. | 2. | Clear the CMOS data. | |||||
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| Disabling respective clock resource |
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| circuit) |
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| to empty PCI & DIMM slots. |
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| Initializing onboard PWM3. |
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| Initializing onboard H/W monitor |
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| devices. |
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41 | C3 | - | - | - |
| Initializing the FDD device. | Detected floppy error. | Unplug the FDD cable and check for | |||
> 25 | > 26 | > |
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| Stopped at 41 |
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| errors or check the BIOS settings. | ||||
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| * | * Replace a new BIOS chip. | |||
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| of the causes too. |
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50 | Power on |
| Initializing USB devices. | 1. | USB failed to boot. (BBS issue) | 1. | Clear the CMOS data first. |
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| 2. | Incompatible USB devices. | 2. | Try connecting the device to | |
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| another USB port. | |
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| 3. | Test the USB devices one by one. | |
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| 4. | Set the USB power source to 5V by | |
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| means of the 5V/5Vsb select jumper. | |
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Debug LED POST and Troubleshooting
113
A
