Daktronics 4000 Series Digital Billboard - Manual (Page 19)

R emoving Modules from the Dis play 13
Figure 17: Module Safety Lanyard
Prevents Module from Falling
5. To reinstall the module, ensure the module is properly aligned with its location in the
display.
6. Reattach signal and power cables. Ensure no cables are hanging between the display
and the module.
7. Insert the module. Place your hand on the
module to keep it in place.
8. Firmly push in the lower half of the module to
ensure the module latches clear the face sheet.
With the 1 /
8
" hex wrench, turn the bottom latch
release approximately a quarter turn clockwise.
9. Repeat Step 8 to secure the top latches.
10. Gently pull the module to verify that it is
properly seated.
Note: If the module is not latched properly, the
springs on the back of the module will force the
module out.
3.6 Module S tatus Indicators
The 4000 series module has two status indicators that
can be seen from the back of the module, one above each SATA jack. Refer to Figure 20.
Operation Modes
Under normal operation, module indicator LEDs (one on each side on the back of the
module) should flash once every two seconds. The table below lists situations in which the
status indicators will change.
Note: When troubleshooting, it is important to know that it will take up to eight seconds to
change modes.
S tatus Indicators P roblem
Both status indicators are on
continuously, not blinking
Critical hardware problem, input power good
Both status indicators are off No power, power hardware problem, or micro will not program
Ten pulses per second Bootstrap active and bad signal being received by jack – Both
ports bad signal
Five pulses per second Bootstrap active and good signal being received by jack – Both
ports good signal
One pulse per second User program active and bad signal being received by jack – Both
ports bad signal
One pulse per four seconds User program active and good signal being received by jack –
Both ports good signal