Unit not turning on again solutions:

Over the past few months there have been sporadic reports of units not turning on again after installation.  When the units are bench tested again this result cannot be duplicated and so the solution needs to be within the car.

There are a few solutions available
1) Temporary solution A
The unit uses both 12V Constant (Yellow) and 12V Accessories (Red)
When the unit is working remove each fuse in turn (but NOT the radio fuse) till the unit turns off.  Once this constant power fuse is known it will be a matter of removing this fuse to re-set the  unit

2) Temporary solution B
  Remove the earth from the battery for a few minutes will re-set the unit.

3) Permanent solution C
Simply cut the constant Yellow wiring and join it to the red accessories wire.  This will mean the unit will work each time the accessories is on but the drawback is that you will loose the clock.  Also the unit will start each time with the radio.  If you would like a clock then the road mapping can be set to display the current time.

4) Permanent Solution D
One of the issues is due to a design fault in many cars where the manufacturer will reduce the amount of copper used to reduce the cost.  This results in thin wiring to the stereo as the factory units need a lot less power than factory radios. And so there is a 2 part solution.
   A) run a heavy gauge power wire direct from the battery to the stereos Yellow constant wire
   B) Run a 12v relay from the accessories wire which will provide power to the unit from the same heavy gage wire.   You will also need to an inline fuse for this.  Should the unit still not work you can always re-set the unit by removing this fuse.