We had problems in the past with the Lawrance HDS 8 going black-out and it was a surprise when it happened on the water. Usually the unit can be powered on and runs OK, but this time, it was again the isolated battery that had a low charge. The HDS shuts down about 11 volts! :( So, on the water, I pulled the panel and changed the power lead to the reserve start battery. That worked! Back in business, but really heavy pound in heavy seas still shut the unit down. A loose connection somewhere in the HDS, the battery leads, etc.? My HDS is no longer serviced and to fix it, it must be replaced with a Gen 2 or later at a cost of about $800 to $1500 depending on the display size I would choose.
Bill has his HDS powered by his start battery and it shuts off each time he cranks his outboard. Have to find a way to keep the low voltage from shutting the HDS off.
Checked the isolated battery during the fishing trip with a load tester and it tested fine. Not so for one of the two start batteries. A replacement will be needed soon. A huge job due to the added installations I made in the hatch.
Yet, my health seems to be worsening and I'm not sure about hobby activities of the future. God willing, I'll have a few more years to enjoy.
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