Compaq Evo D500 USD Getting Started Manual page 20

Getting Started
Keyboard LEDs
LED
Num Lock
Caps Lock
Scroll Lock
✎
16
Color LED Activity
Green Flashing
Green Flashing
Green Flashing
This information is not applicable to USB keyboards.
The FailSafe Boot Block ROM allows for system recovery in the
unlikely event of a ROM flash failure, as for example if a power
failure were to occur during a ROM upgrade. The Boot Block is a
flash-protected section of the ROM that checks for a valid system
ROM flash when power to the system is turned on.
The following table lists the various keyboard light combinations
used by the Boot Block ROM, as well as the meaning and action
associated with each combination. Refer to the Desktop Management
Guide for more detailed information.
State/Message
Memory error
No video
System board failure, prior
to video
Quick Setup & Getting Started Guide