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2.4 System Board | 2 Troubleshooting |
Procedure 3 Printer Port LED Check (in Resume Mode)
The printer port LED displays the POST status and error status by turning lights on and off as an
Follow the steps below to use the printer port LED:
1.Turn on the computer and set the resume or suspend mode.
2.Turn off the computer.
3.Plug the printer port LED into the computer's parallel port (printer port).
4.Read the LED status from left to right as you are facing the back of the computer.
5.Convert the LED status from binary to hexadecimal notation.
6.If the final LED status is FFh (normal status), go to Procedure 5.
7.If the final LED status matches any other status in Table
| Table | Printer port LED resume mode status (1/7) | ||
< Resume mode > |
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LED Status | Test Item | Description | ||
(Hexadecimal) | ||||
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0H | DIAG_SYSTEM_INIT | Boot started,read the cmos data for makesure | ||
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| main board power is stable | |
1H | DIAG_A20_DISABLE | Disable A20 through A20 | ||
2H | DIAG_INIT_CHIPSET | Initialize ChipsetSet,load chipset default | ||
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| size chache RAM | |
3H | DIAG_TEST_RAM |
| send patten for test the basic 640k RAM | |
4H | DIAG_MOVE_BB_LOADER | Move boot load segment into the RAM | ||
5H | DIAG_EXECUTE_IN_DRAM | program execution from DRAM | ||
6H | DIAG_USER_FLASH_CHECK | Test print port for check | ||
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| crisis option is enable or not | |
7H | DIAG_SHADOW_BIOS | Decompress the system BIOS, and | ||
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| Shadow System BIOS to RAM | |
8H | DIAG_CHECKSUM_BIOS | Checksum System BIOS ROM | ||
9H | DIAG_NORMAL_BOOT | Jump to the reset point | ||
AH | DIAG_CRISIS_BOOT | Proceed with Crisis Boot,first initial | ||
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| superio and boot device | |
FH | DIAG_FATAL_ERROR | Fatal Error,like the RAM error or ROM error | ||
CCH | DIAG_CRISIS_BEGIN | Start process the Crisis recovery procedure | ||
99H | DIAG_RESUME_RAM_ERROR | Resume SMRAM not Found | ||
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TECRA S1 Maintenance Manual |