Blinking lights and boot error codes
In some cases, when the host processor is not executing code or does not have the necessary code to drive the
display, light blink codes inform you of a problem.
The following information is from the white paper http://h10032.www1.hp.com/ctg/Manual/c04685655.
Table 7-53 Blinking lights and boot error codes
Blink codes Error
Amber battery light: blinks 1 Hz continuously Embedded Controller unable to load rmware
Caps and num lk lights = 1 blink Processor not executing code
Caps and num lk lights = 2 blinks BIOS recovery code unable to nd valid BIOS recovery image
Caps and num lk lights = 3 blinks Memory module error
Caps and num lk lights = 4 blinks Graphics controller error
Caps and num lk lights = 5 blinks System board error
Caps and num lk lights = 6 blinks Intel Trusted Execution Technology (TXT) Error
Caps and num lk lights = 7 blinks Sure Start unable to nd valid BIOS Boot Block image
Caps and num lk lights = 8 blinks Sure Start has identied a problem (Manual Recovery Policy Set)
Processor not executing code
This computer experienced a problem due to the failure of certain code to execute, resulting in a failed startup of
the processor.
The issue could be related to the processor or the system board in the computer. If the processor is socketed, be
sure that the processor is seated correctly in the socket. If this error reoccurs, see General troubleshooting steps
on page 101.
NOTE: The computer attempts to notify you of this problem through a series of blinking lights. When you
attempt to turn on the computer from an O or Hibernated state, lights associated with the caps lock and num lk
keys both blink once, followed by a pause, and then continue in a repeating pattern.
BIOS recovery code unable to nd valid BIOS recovery image
This computer has experienced a problem in locating a valid BIOS image, resulting in a failed startup.
You can resolve this problem by placing a clean copy of the system BIOS on a USB key or in the appropriate hard
drive directory and performing a reboot. If this error reoccurs, see General troubleshooting steps on page 101.
NOTE: The computer attempts to notify you of this problem through a series of blinking lights. When you
attempt to turn on the computer from an O or Hibernated state, lights associated with the caps lock and num
lock keys both blink twice, followed by a pause, and then continue in a repeating pattern.
Memory module error
This computer has experienced a memory initialization problem resulting in a failed startup. This issue might be
related to the memory modules in the computer. You can resolve this problem by ensuring that memory
modules are correctly inserted and seated.
ENWW Additional information 169
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