acf692a4_L__service_error_lights_5L__6L_atus_and_action_identification_Condition
[Cause] The memory card may be slower than 70 ns. [Action] Remove the incompatible memory card and replace it with a 1, 2, 4, or 8 MB, 70 nanoseconds or faster (such as 50 nanosecond) memory card. [Condition] 
All three lights flashing.
hp error code indicator light 5L,6L, service error lights 5L, 6L
Condition