Green light blinks rapidly, cds, games etc dont load.........bran

You probably pinched a wire when you put the bed back on. You most likely have a blown fuse as further proof that you shorted out everything in the back of the truck.
Recheck all your wiring paths.

Disconnect cam, restart computer, plug back in.

there are 2 switches inside of the transfer case. they are screwed into the bottom of the transfer case. you may have an issue with one of them or both. by the way, you dont need to put the truck in neutral to shift the truck into 4x4 high. you can doit while you are moving. try that also. you do need to stop to put it in 4low. but i would be looking into those switches screwed into the transfer case. we/nissan had some issues with those.

try this ... if there is a reset button on your 'front' control panel..maybe 2 - 3 positions to the left of your blinking timer light..
try inserting the tip of a mechanical pencil or tip of a straighten paperclip into the 'tiny hole' of th ereset button ...hold pressure on that button until yout blinking light starts blinking RAPIDLY .. this
rapid blinking should continue for several seconds or a minute.
then it should stop .. may even go off ... now ..hopefully.. you will be able to turn your set on

The lamp light would be solid red if the lamp were out. The steady blinking green led is usually caused by failed capacitors on the DM board. You can get the V26 dm repair kit from www.tvrepairworld.com which should repair that issue. The kit contains the capacitors and the CD with detailed instructions.

Check the bulbs of dashboard lights and also check the cabin fuse box. Its not a big deal, any electrician can solve this problem.
My advise to you to find out a reasonable quote for this repair, because if there is any problem while you drive (engine oil level is dropped etc etc) then you will at least know it at the spot just because of these lights.

do this. press and hold device and menu button on set for 5 seconds. this will retrieve a 2 digit error code .. the led will flash the first digit and pause the flash second digit. This unit is known to have capacitor problems on the power board. getting to these capacitors involves taking alot apart. let me know error codes and we can continue troubleshooting

When 1 is inop and the other rapidly blinks that generally means a bad ground to the front light if you can't find it just attach another ground wire to the bulb socket and see if the light blinks normal.

how many times does it blink

Bad load belt,,,,load motor just spinning,have belt replaced