Went out to plow snow yesterday, L3240 HST, turned the key and dash display came on momentarily, then went black. Attempts after that never had any display. Presumed my battery was dead, and replaced it with a new battery today, turned the key and no display. New battery has 12.6 v across terminals, as does the old "dead" battery that I just took out. Checked the main fuses near the battery connection and they are all good. Too cold to mess around further with it other than bouncing on the seat and depressing the clutch and HST pedals as a hopeful last-ditch attempt to see some life. Nothing- what am I overlooking, and where should I start to troubleshoot this?