Shuts down and says no signal, sounds like it is overloded when it does this, could i need a new fan?

There are two fan switches on that car;
The main one turns the fan on and off when the ignition is on and the car is running.
The second switch powers the fan if the ignition is off and the engine temperature is too high, to cool the engine off if it was just shut down.
It sounds like your main fan switch has gone bad and needs to be replaced since it's not sending any signal to the fan, while the engine is running.

is it a 2 pin or 3 pin fan? is the fan turning? the 3rd wire lets the machine know the fan is turning if it doesnt get the signal it will shut down to prevent overheating.

the compressor has an internal overlod inside of it after 115 degress it opens and wont start till it cools down below 115 unplug and try putting ice cubes on top of com pessor to cool it down otherwise it will take hours to cool off

The main fan that cools the lamp is mostly high speed when the unit is running. when it shuts down it slows the fan down, until it stops in standby. So the noise is only really loud when it is showing a picture.

try setting the fan to eco mode (slower running) and see if the noise is acceptable. If it is still too loud then you will have to replace it. Have a look at the fan and see if any of the plastic blades are missing.

there is a problem with the power to the front fan from the main board. there are 3 wires going to the fans: one power, one return, and one signal. if the main board reads no signal from the fan's speed, it'll shut down. check the power going to the fans and the signal. you may need to replace the main board.

When computers shut down like this they are getting the signal from the motherboard. This is most likely a thermal shutdown signal from the processor. When you changed the fan, did you clean the processor off and apply a small thin layer of thermal paste? The processor may not be cooling properly or the motherboard is getting a bad signal from the processor's thermal circuit. Try new thermal paste on the processor and then go through the board again and make sure everything is in its place. Also, leave the side panel off and see if the system stays running, this will aid in the cooling. Let us know if it works, if not we may have more ideas to help.

there is a problem with the power to the front fan from the main board. there are 3 wires going to the fans: one power, one return, and one signal. if the main board reads no signal from the fan's speed, it'll shut down. check the power going to the fans and the signal. you may need to replace the main board.

Sound like the fan needs to be replaced. If the fan is not flowing enough air through the condensor the heated generated by the A/C system can not be disapated, which causes the pressure in the A/C system to rise, and the computer will shut the A/C system down to prevent damage to the A/C compressor. When you are moving down the road, there is enough air flowing through the condensor so that the pressure stays within a normal range and the computer will allow the A/C system to continue running. Your local Nissan dealer can test the fan system to see if the fan is functioning normally.

Does the projector work normally when sitting right-side up? If yes, something could be interfering when the unit is inverted. The symptom you describe initially sounds like a defective fan (some fans put out a computer pulse telling the main board it's running--they have 3 wires, red, black, yellow(signal)). If the board doesn't get signals from all required components, it's programmed to shut down to protect itself.

Bad light engine.
Contact Samsung for replacement.