Dell Precision M6600 Owner's Manual page 133

Diagnostic LED
Solid
Blinking
Solid Blinking
Blinking Blinking
Blinking Blinking
Blinking Blinking
Blinking Off
Solid Blinking
Blinking Solid
Off Blinking
Solid The microcontroller is handing control of
the system to the processor. This code
persists if no processor is detected.
Solid The memory has encountered an error.
Blinking A system board component is faulty.
Solid The video card is preventing the system
from completing POST.
Off The keyboard is preventing the system
from completing POST.
Blinking The USB controller encountered a problem
during initialization.
Blinking No SODIMMs are installed.
Blinking The LCD encountered a problem during
initialization.
Blinking The modem is preventing the system from
completing POST.
Error Description
133