Specifications

System Diagnostics
Table 7-2: POST Beep Codes continued
Code Beep POST routine description
Eah Initialize OEM special code
Ebh Initialize PIC and DMA
Ech Initialize memory type
Edh Initialize memory size
Eeh Shadow boot block
Efh System memory test
F0h Initialize interrupt vectors
F1h Initialize run time clock
F2h Initialize video
F3h Initialize System Management Manager
F4h Output one beep
F5h Clear huge segment
F6h Boot to Mini DOS
F7h Boot to Full DOS
Note: If BIOS detects error 2C, 2E, or 30 (base 512 KB RAM error), it displays an additional
word-bitmap (xxxx) indicating the address line or bits that failed. For example, "2C 0002" means
address line 1 (bit one set) has failed. "2E 1020" means data bits 12 and 5 (bits 12 and 5 set) have
failed in the lower 16 bits. Note that error 30 cannot occur on 386SX systems because they have a
16 rather than 32-bit bus. The BIOS also sends the bitmap to the port-80 LED display. It first
displays the checkpoint code, followed by a delay, the high-order byte, another delay, and then the
low-order byte of the error. It repeats this sequence continuously.
POST-related Troubleshooting
Perform the following procedures when POST fails to run or display error messages/emit
beep codes.
During routine bootup
Check the following:
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All external cables and power cables should be firmly plugged in.
The power outlet to which the server is connected is working.
The server and monitor are both turned on. (Power indicators should be illuminated.)
The display's contrast and brightness settings are correct.
All internal cables are properly connected and all boards firmly seated.
The processor is fully seated in its socket on the mainboard.
The heat sink-CPU fan assembly is properly installed on top of the processor.
Verify that the all memory modules are properly installed.
HP ProLiant ML110 Server Operations and Maintenance Guide 7-9