Fishfinder trouble...Help!

[croejr39]

Hi Guys,
Newbie here!. Have a 13 ft 2003 Whaler with a Piranha II fishfinder on it that has started to act up. It turns off by itself. I am sure it is a power electrical problem of some sort. Any ideas where or what to look at? Battery cables? After it does this I reconnect transducer and power cables and turn it back on but this is a pain. I am debating just getting a newer model. I am pretty handy but could use some advice on this one.
Thanks.

[Scooper]

does the fishfinder just turn off by itself or when you do something that may draw extra current from the battery, (start the engine, key up the VHF radio, etc)?
I had a battery problem that would cause mine to shut off when I started the boat.... Typically they work or don't work so if its intermittent, it maybe something other than the fishfinder.

[Foul Hook'd]

If it is cutting off when starting the engine like scooper said it's probally a bad battery cell or check the power cables for the unit, a little corrosion on the ground connection can make electronics do some crazy things.

Foul Hook'd