Suddenly power off

2-5 minutes , it will not overheat
the power supply is defective

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How long has it been running, projectors ALWAYS turn off when the overheat remove anything covering the cooling vents and it may have dust inside which will compound the problem.
Solution wait for 5-10 minutes.

sony lcd turns on, giving me signal and picture in 2 minutes, then suddenly turns off and the fans goes crazy. what can I do to prevent this? I have tried to reset the projector and switched the powermode to normal, but this didn't help.

Your projector need replacement of lamp unit if you don't want yet you just reset the lamp counter

procedure:
Power on projector
press MENU key
Press right arrow key to select Option
Press down arrow key to select lamp Hours
Press and hold down the ENTER key 5 second (lamp hour counter show red)
press POWER button to turns off the projector
now you power on your projector and no error displaed and no itself turn off after 15 minutes

You need to reset the LAMP RUNTIME counter

1. Press the MENU button to display the menu screen

2. Press the UP and DOWN arrow buttons to select the "OPTION" menu

3. Press the ENTER button and then press the UP and DOWN button to select the LAMP RUNTIME

4. Press and hold the ENTER button for approximately 3 seconds

5. The LAMP RUNTIME screen will be displayed.

(Note: press any button other than the Power button to cancel the LAMP RUNTIME screen)

6. Press the POWER button to turn off the power

7. After the POWER button on the projector illuminates red you restart the projector

and check the LAMP RUNTIME counter it should be "0"

it wasn't able to go through cooldown mode. turn it on, power down and let it go through cooldown. does the light come on at all?

Hi,
have you check the filter?

overheating or power supply problem.

With the power on and the lamp off, hold the input button down on the projector then press and hold the power button for 5 seconds

i have the same problem with my projector it sudden turns off, and it has a blue stipe on the bottom of th screen. is this a sign that my blub is bad? or is it the power supply that is damaged? it can be on for days without any problems and then they come and go..