Nikon SB-24 LCD panel display does not appear, Released even with the ready-light on

Troubleshooting:------------------- ...

If any of ·the following conditions occur, check
each of the points indicated and refer to the
numbered instruction.
REFER TO:
LCD panel display does not appear:
Are batteries properly installed?	2
Are batteries fresh?	5
Is battery chamber lid firmly closed?	3
Is the power switch set to STBY or ON?	5

Flash does not fire when shutter is released:
Was the ready-light on when you took
the picture?	12
Flash does not fire and shutter cannot be
released even with the ready-light on:
With the F4 : Is the film advance mode selector
set to S?
With the F-801/N8008: Is the power switch set
to ON?

Incorrect display appears:
Is the unit correctly mounted on the camera?.... 4
Are all camera settings correct?	1
Ready-light does not light up:
Are batteries properly installed?	2
Are batteries fresh?	5
Is the battery chamber lid firmly closed?	3
Is the power switch set to STBY or ON?	5

Flash does not fire even with the ready-light on:

Is the unit correctly mounted on the camera?.... 4
Ready-light blinks after shooting:
Is subject within the shooting distance range
indicated on the SB-24'sLCD?	11