How to fix my fan fail error on my Acer X1161P projector? I have tested the fans and it seems like if it is a system problem, when it starts cooling down after the error they both start spinning...

Look at bottom and back to remove all the screws then slowly left out.

fan fail will system automatic shut down soon how i removed this error

While I am not sure of this feature on the Vivitar projectors, extensive testing has proven that running the cooling fan to accelerate cooling of a projection lamp will significantly shorten the lamp life. It is always recommended that (if possible) the projector system is cooled to room temperature without the fan running. Also, it is recommended not to move the projector until the lamp is completely cooled, as the lamp filament is extremely fragile when hot.

Overheating When the CPU overheats then it will shut down (i.e. thermal overload) and won't boot up again until it has cooled down. If this is the problem is not fixed then the CPU will eventually fail.
A faulty fan causes the problem or the fan and heat sink assembly are clogged with dust.
Check the CPU fan to see if it spins freely, if not replace the fan.
If the fan and heat sink is clogged with dust the remove the dust and make sure the vents are clear and dust free. Use a small brush and can of compressed air to do this.

projector tv works like a projector.
the superhot bulb needs cooling, and if the cooling fails, it shuts down.

so what you have is either the fan is not working, or the cooling system is not working.

have to fix it professionally.

If the Fan fails the temperature goes up and so the temperature is detected to be high to cut off the projector.
Please replace fan or correct the power to the fan.

Not sure if this helps with the 7200 bu had a 4805 with a failed fan issue. There are two fans inthe unit, one smaller one that cools the color (colour) wheel and the larger one that cools the lamp. This unit had a problem with the larger lamp fan not turning. Unplugged and disassembled the unit to get the fan out and tested the fan using a 9v battery and a couple of wires (best to uplug the fan from the controller board so you are not forcing voltage into the unpowered controller board... that said, I did it hooked up just peeling back the label in the centre of the fan and touching the wires to the solder contacts) The fan worked fine so figured the controller board was the issue, so this wasn't going to be a simple "buy a new fan" issue.

Here is where your mileage may vary...

I decided that it would be OK to just run the fan. Unplugged the fan and powered it from the 9V battery and assembled the unit and powered it up. Found that there was 7v available on the power board at the second pin that was alwasy on when the power switch was on (thats the positive 7 V pin, but measure it with a meter since we are talking about a different projector) and just wired the fan direct to pin 1 and 2 (1 is ground on the 4805, 2 is +7V) and so now whenever the main power is on the fan runs, so after ti cools down I just power off the main power when not in use... or let the fan run if the noise isn't an issue. Crude but effective fix.

I had the same problem and fixed it today. The fan is 70 x 70 x 20mm. I could not find the exact one, but 70 x 70 x 15 works just fine and I was able to find that fan at a Micro Center store for $8.99. The fans should be blowing air out from the front of the machine, not blowing in on the lamp.