My unit will not turn on.

Check the following:
1) The on/off thumbwheel on the side of the unit
2) The fuse in the power cord. (To check the fuse in the power cord, unscrew the silver tip end that plugs into the cigarette lighter. If the fuse is blown, replace with a 2 amp fast burning fuse).
3) The fuse for your cigarette lighter
4) If it is none of these, return the unit to the manufacturer for repair/replace at our discretion.