Ok guys I need some help. My. HB 999 and 589 upfront are acting up. The front one cuts off after maybe 3-5 minutes and the console mounted 999 will go for a while but it gets real dim and the screen is not really visible but the power is still on. If I run the outboard motor for a while, it will seem to work fine.
Otherwise for most of an outing, I have no sonar or imaging at all.
Is it the battery or a short or what? Need some help please.

