Is that a Cummins/Onan "official" repair place, or a local RV place that does Onans?
I took mine to some guys about 50 miles away, who aren't Cummins, but who have
been working on them for years, and can do about anything a certified Cummins/Onan
shop can do. They fixed an electrical problem for me in March 2010. It was expensive,
but a lot less than $125/hour. Ouch!!!
Is your new TV an LCD or LED? The LEDs are amazing looking and if I hadn't just replaced
my old CRT with an LCD flatscreen 2 years ago, I'd probably have got an LED instead. Very low
power consumption when running off 12V source, I believe.
My Sharp 19" only draws 29W at 120VAC, so it's a pretty low draw too. I think it works out
to around about 2.5 Ah at 12VDC.