"Moores family" wrote in message
...
Larry W4CSC wrote:
Moores family wrote in
:


Thanks all,
Yep, I've done all the obvious stuff, I wanted to find out if there's a
known trick before I decide whether repairing the minor niggle- the off
button doesn't work, is worth the risk of causing irrepairable damage
getting to it.
Thanks again.
JM




If this off button is the usual rubber switch, try pressing it in while
sliding it around to see if you can clean the contact off without taking
it apart. Rubber switches are nothing more than a black, conductive
rubber nipple in the middle of the button, made right into it, that makes
contact with some "fingers" on a printed circuit board. If any foreign
material or a little corrosion because it's made as cheaply as they can
make it, get between the rubber nipple and the fingers....it won't
contact enough to flip the IC it's connected to. There's just scanning
signal on these fingers...no DC or current....so it won't clean itself.
Try pressing it in fairly hard and rubbing it around like you would a
pencil eraser as far as it will slide sideways....



Unfortunately it's got a stiff plastic adhesive membrane over the
"keyboard". The next step'll be to peel that off to see what I can get to
underneath, I may be able to use the wiggle technique then but it feels
more like the type that's got little dimples in a thin metal sheet for
contacts than conductive rubber. We'll see. If not it turns off when I
turn off the master battery switch anyway...
Thanks
JM

I think I'd leave it alone. If you don't want it on all the time the master
switch is on, you could fit a switch in a nearby panel.
There could be one problem though, on a lot of fishfinders (not sure about
the Fish eagle) pressing the off button momentarily changes the backlight.
To switch off you have to hold it pressed for several seconds.
Regards,
Brian