speck wrote on Jul 2^nd, 2011 at 12:08pm:

Just a long shot. Are fuses simulated on the overhead panel?

As strange as it may sound, it sure seems like it has something to do with those pesky fuses.

I have just deleted FSX (removed EVERYTHING so there was no trace of FSX left), reinstalled FSX/ACCELERATION using the repair option and this created a new installation of FSX. The first thing I tried after reinstalling (using the repair option) the 707 was the nav lights. They weren't working. :'(

But I got them working again. Here is how.

When they don't work, I have to turn all the lights OFF, press all the fuses IN, then turn on my nav lights and they work. IF the fuses are already IN, I the way to do it is, that I have to turn all the lights OFF, pull all the fuses OUT, then press them all back IN again, then turn on my nav lights and they work.

Weird! But they are there and working again. Now I have a nice fresh installation of FSX to mess around with. Unfortunately, I have all my add-on aircraft, scenery and all to reinstall. At least all my CS FSX aircraft are reinstalled and ready to fly. ;D ;D ;D

Mark