SOny VPL-EX1 turns on for a few minutes and then the Lamp /Cover LED and Power ON/Standby LED flashes.

the filter cover sometimes gets distorted and the small plastic dimple which presses against the switch doesnt activate correctly, check the lamp cover switch also.

When you open the lamp cover for replacement of lamp there is a switch in the projector is OFF
If lamp cover not fix proper after replacement of lamp the lamp/cover indicator flashing
SOLUTION: Open the lamp cover and fix proper and tight the screw

A Flashing Red ON/STANDBY LED means one of the following
2 Flashes - The internal temprature is high. Check the air holes are unobstructed.
4 Flashes - The fan is broken
6 Flashes - The internal electrical system has failed.
There is no entry in the manual for 12 red flashes.

Possible that the lamp is faulty -if the hours have elapsed- check the lamp holder, the fitments.
check also the filters, clean and reset.
Make sure the power supply Unit is not having any poor soldering or faulty components to reduce the voltage output to the lamp thus making it shut down..

1.unplug power cord
2.plug back in and it should be in stand by mode.(red light on)
3.do not power on
4.on remote push RESET,LEFT ARROW,RIGHT ARROW AND ENTER(do it in less than 5 seconds)
5.after you have done this power on and go to menu and it should show lamp hours 0
6.if it didn't work just do it again, it took me a couple of tries.

Try replacing the lamp cover with a new one, if that does'nt work then it could be the sencor for the lamp cover, and if that does'nt work then contact your sony dealer and see what they can do.

Here's an excerpt from the Sony Manual online. And the link - http://esupport.sony.com/US/perl/webtree.pl?template=EN&mdl=KDF55XS955&content_id=68&category_id=11&problem_id=52

The POWER/STANDBY (red) indicator flashes three times
If your power/standby indicator is flashing in a pattern of three flashes, this may indicates that the lamp cover is not attached securely. Follow the directions in the Operating Manual under changing your lamp that related to closing and securing the Lamp Cover. Ensure that the Lamp Cover Door is securely fastened by tightening each screw.

The POWER/STANDBY (red) indicator flashes continously
If your power/standby indicator is flashing continuously, and the lamp cover has been secured, your TV may be in need of service.

The POWER/STANDBY indicator is lit up green (not flashing)
A sustained green light indicates your TV is on.

The POWER/STANDBY indicator is lit up red (not flashing)
A sustained red light from your power/standby indicator simply indicates that your TV is in standby mode. This shows you that your TV is ready to be turned on with the remote.

Is it the power light and not the lamp light? If the lamp light is flashing then replace the lamp.

I have had the same problem with 3 Sony VPL-EX1s and Sony will not answer emails regarding the problem. Hence I wont be purchasing Sony projectors again.

my sony vpl ex3 will not light up, has a lamp/cover light on all the time can somebody help

Hi there

Replacing the lamp won't make any difference at all.

If you have checked the fuse on the Powersupply Board and it tested ok , then the whole Board will need replacement.