HDS 8 - Ran for 15 seconds then went dead

Got new HDS 8 unit unpacked and into boat Saturday.
Hit power button and the lighted keys came on for about 15 seconds then unit went dead.
Tried power button again. No luck.
Reseated power cord and tried again. Nothing.
Hooked power cord to a 332c unit. Works fine.
Took it back to Cabelas for replacement.
Not Fun...

That sucks, hope you don't live to far from cabelas.

Make sure you clip the cables clean for any unused GPS wires so they don't touch. I had this problem with my 7 and called them. Have not had a problem since... It's not fun when you have those problems.

Thanks for the tip.
I will check on that before I proceed.

Springhill Duckman, You were right. The GPS wires in the cord I was using were all touching. Sorry to take so long to acknowledge your help.