Lamp resistance and voltage

make sure the lamp door is engaging the safety switch. make sure the colorwheel spins also, it the colorwheel doesn't spin up the projector won't start.if thats not the problem you need to check the resistance on the thermal switch which is on top of the lamp housing. it should be infinite. if thats not it it could be the power supply or the main board.

Its due to lamp Ballast power supply is faulty,it need to repair or replace otherwise again it will damage Lamp so be careful

make sure the colorwheel is spinning. if it is not, replace it. also, blow the dust out of it with canned air. excessive dust kills lamps quickly. you'll also need to reset the lamp timer. are you using an sp-lamp-009? the sp-lamp-018 looks exactly like it, but is used in th x1a and x2. the x1 only uses the sp-lamp-009. if all else fails, replace the power supply.

your display settings may be off, so change settings to factory reset and you may have to drop the resolution on your computer. you may also have a bad cable, so try a different cable.

very simple. remove the lamp door on the left side (looking from the front) using a flat head screwdriver. unplug the plug, and unscrew the 2 screws. pull the lamp out. put the new one in and reverse the instructions. piece of cake!

no high voltage to the lamp? replace the power supply/ballast board. were you trying to test the voltage with the door open? you won't get any if you don't trigger the door switch. safety measure.

3 red flashing is a lamp error, not the fans. the lamp has a problem striking. make sure it's pushed in and plugged in all the way. if the lamp is not that old, the power supply needs replacing.

more then likely the ballast has gone bad and the lamp is not getting the right voltage to fire. Only other thing you can do is remove the lamp the turn the power on and check the voltage at the connector. This will not check the triggering voltage mine you only the lower operating voltage. But since you have replace the bulb with a known good one I'm betting on the ballast is bad.

From the infocus_lp650 manual
Table 2:
Red LED Behavior Explanation
One (1) blink The lamp won't strike after five (5)
attempts. Check the lamp and lamp door
installations for loose connections.
Two (2) blinks The lamp counter hours have exceeded
lamp life hours. Replace the lamp and
reset the lamp hours counter.
Optional Accessories Part Number
Three (3) blinks The projector has shut down the lamp.
Replace the lamp. Contact Technical Support
for repair if replacing the lamp does
not solve the problem..
Four (4) blinks The fan has failed. Replace the lamp (the
lamp module contains a fan). Contact
Technical Support for repair if replacing
the fan does not solve the problem.
Five (5) blinks The projector is overheating. Check for a
blocked air vent. Contact Technical Support
for repair if clearing the air vents
does not solve the problem.

you tried holding down both of the volume keys for 10 seconds while powering up?