588 wont turn on

[Sil79]

Hello all. I have recently started having a problem with my 588. Yesterday it shut off after being on for about 6 hours. I tried turning it back on but struggles to get past the resboost screen and turns itself off as soon as the sounder screen comes on.

Battery voltage is at 14.2 volts while running and 12.6 v off. V checked the curcuit breaker and all connections are solid. it ran for 14 hours straight the day before with no issues. Any advice on trouble shooting will be appreciated.

 

[Johnny Electron]

It sounds like a power or connection problem. There is more to power than just voltage. If the current is dropping on the boat the unit will power off due to protection circuits. What type of grounding do you have tied on the grounding lug at the back of the unit?