Have you encountered a situation wherein you are turning the Fish Finder on and even though you pressed the power button for how many times and with all of your force it doesn't seem to switch on? Even replacing the batteries with a new set didn't help. That kind of situation can be really devastating and can ruin your fishing activity since you need to switch on the unit first before you could start doing anything. So your last resort is to contact the supplier to have the unit replaced. Hold on, we can still do something about that, let me enlighten you!
I will teach you a technique to do this thing right. The common mistake is on how they turn on the device. Please be reminded that you must press the center of the power button. We have this habit of pressing the power button on the edge or just around the button, doing this won't turn unit on and only flash of light can be seen on the screen. You must place your finger on the dead center of the power button then press it. To turn off press the dead center of the button again.
You may also check the video on Gain Express Channel via link below on the procedure on how to do it right. If the problem still persist, that's time to contact the supplier and have the device replaced. I hope you have learned something from this post.