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All electronics dead What happened?

Old 08-23-2017, 03:56 PM
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Default All electronics dead What happened?

Went to boat yesterday and found the following not working Stereo, Vhf remote station, KVH Antenna, Bose lifestyle amp

What happened?
What can I do to prevent repeat?

Thanks for input
Old 08-23-2017, 04:03 PM
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No power or ground,Do they all feed off 1 Buss Bar? Any Lightning lately?
Old 08-23-2017, 04:04 PM
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Battery dead? Main switch off? Fuse blown? Take a lightning strike?
Old 08-23-2017, 04:12 PM
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Fuse for electronics or "house " circuit blown , either at dash, breaker panel or within less than 1 ' of battery or battery switch??
Bad supply or ground connection at battery or dash? Was battery switch left on?

What is voltage at house batteries and dash and those electronic devices?

If batteries and connections are good, it's possible there was a lightning strike too nearby.
This may be avoided in the future by putting a tin foil hat on the boat .
Old 08-23-2017, 04:19 PM
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Newer battery switches will have a fuse behind/in the switch, check that.
Old 08-23-2017, 04:40 PM
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Boat is berthed at a marina.
All electronic breakers were off
Battery chargers are always on on auto
Old 08-23-2017, 04:44 PM
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Check that the chargers have not tripped off.

Check actual battery terminal voltage with a meter.

Check fuses/breakers.

If all units are powered from the same buss, check volts there.

Ask marina or boat neighbors if they had any recent lightning.
Old 08-24-2017, 05:07 AM
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Originally Posted by mangrove11 View Post
Boat is berthed at a marina.
All electronic breakers were off
Battery chargers are always on on auto
Your voltage meter is your friend. Pretty easy to use and will tell you quickly if it's a battery/breaker issue or if your electronics were fried.
Old 08-25-2017, 05:30 AM
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If your motor runs it's probably not lightning, that usually fries everything on the boat.
Old 08-30-2017, 03:15 PM
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Well today my mechanic looked over boat
He says engine computer boards and bridge displays are fried and need replacement
Anyone knows where I can get these parts at a discount over Cat pricing?
Old 08-30-2017, 03:25 PM
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I’d order a surge protector to protect from shore power also.
Old 08-30-2017, 03:59 PM
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Look at your antennae on top of the boat and see if any have tips blown off by lightning.
Old 08-30-2017, 04:07 PM
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Originally Posted by pmgia View Post
I’d order a surge protector to protect from shore power also.

Yup, power surge, or "Transient".
It can happen if there is a lighting strike in the area.
Happened several times to me in Florida.
Nowadays I never leave the battery charger ON of there is any chance of thunderstorms.

Installed a surge protector before main AC panel on house, and additional protectors on outlet for expensive stuff, PCs, TVs, electric car, etc.
Should have done that from the day I moved in 18 years ago.
Old 08-30-2017, 04:25 PM
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You sure no one did not inadvertently make a reversed battery connection? As in + battery lead to a to - battery terminal and - lead to + positive terminal.

Not that difficult to do if not paying attention.......
Old 08-30-2017, 04:52 PM
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Originally Posted by csy man View Post
Nowadays I never leave the battery charger ON of there is any chance of thunderstorms.

l
so, the charger is OFF 9 months of the year?
Old 08-31-2017, 03:05 AM
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Call your insurance company...might be covered...
Old 08-31-2017, 04:54 AM
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Originally Posted by chainsaw42 View Post
Call your insurance company...might be covered...
^^This^^. I had my electronics fried when a lightening strike hit a sailboat 3 docks away. You don't have to have a direct hit to lose electronics. Insurance pays - but you need the correct appraisal. i'd let the insurance co know that you had a lightening strike.
Old 08-31-2017, 05:39 AM
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Thank you
Still Trying to assess extent of damage
Old 08-31-2017, 07:37 AM
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Originally Posted by diver dave View Post
so, the charger is OFF 9 months of the year?
Uh, no...
Only charge for 5-6 hours at the time, easy to check the weather for a few hours ahead.
Only drain on batteries are bilge pumps in heavy rain.
Can easily let the boat sit for 6-7 days without charging.
Then plug it in, or use it for a few hours to top of the batteries.
Simple really.

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