Simrad NSE slow to boot up

[Nigelk]

Hi guys. Appreciate some help with my NSE 8 MFD. last three times I have gone to use it press the power button and dead. Then apparently all in its own 5 minutes later it bursts into life and goes fine all day. Seems to be taking a long time to boot up but would appreciate any easy fix.
Thanks in advance for any help.
?

 

[Pau Hana]

Have you made sure your system is updated with the most current software revision?