Trouble with Dolphin Power Supply

[Captain 776]

Have any of you had a problem with the Dolphin power supply when you push the button for it to come on, you need to try many ways, hold it, try again, can take 15 minutes to get the dial to light up

 

[mhosborn]

I've been through 3 Dolphin DX-4 power supplies in the 4 years I've owned the robot. And found that, when it starts to go bad, what you described starts to happen.
My troubles with it dropped dramatically when I began covering the power supply/cart after using it, but I'm still not thrilled the units aren't sealed better against the elements.

 

[JamesW]

I suspect that water is getting in the power supply.

Rock the power supply back and forth to see if it sounds like there's water in it.

Is it plugged into a gfci protected outlet?