My projector shuts off after only thirty seconds. and a red light turns on. I don't think it's over heating because it's not hot. Can anyone help?

Most probably failure of the thermistor or thermal fuse that detects the temperature of the lamp housing - so the projector thinks it's hot even when it's cold. Unfortunately it will need a trip to an authorised service centre for repairs

The most common fault is the lamp. Their rated life is 2000 hours,
Quite often when they go out, the glass cracks,
Do not touch the glass lamp, The oil from your fingerprint will cause uneven heat distribution and the new lamp may crack when it gets hot.
The Power Supply often shuts down immediately at turn on when the lamp no longer works.

I have a Christie RoadRunner L8 that fires up,lamps turn on and about 5 seconds after the lamps fire up it shuts down and both the warning temp. and ready lights flash at the same time. It seems to me it must be a sensor that tells it to shut down thinking that the machine is too hot-all the fans work and all of the filters are clean and it is moving serious air any clue and if so where do I start to look for such items? Thanks in advance Kirk

Is the projector receiving a source signal? if not it will power itself down after whatever time you have it set to do so when no signal is present.
Just an idea?

reason for fan spinning at high speed after shutdown is to cool down the projector after it has been on
you will feel hot air from exhaust as this is taking the heat away from the lamp, where all the heat is generated
if it shuts down after 20 mins either the projector is blocked, maybe, a fan is not running, filter blocked, or the motherboard is now u/s

either the lamp cannot strike (meaning a ballast or lamp issue) or there the fans are not up to speed to sufficientl;y cool down the lamp and therefore shut down to avoid damage.

Sent projector to V3 Systems & Services Pte Ltd 64522679

1st independant Projector Service Centre (SINGAPORE)
Chip & Component level service on board level electronics

My solution sounds dumb, I had the same issue. Took the lamp cover off the bottom. The screws were loose holding in the lamp. Maybe they heat and expand and eventually work their way out and the lamp doesn't make good contact. Just tightened mine up, the unit would power off after 45 minutes prior. Been on now for 5 hours, no trouble.

try pressing and holding the enter button on the projector for about 30 seconds - this resets it. It worked for me!!

I'm having the same problem. My Model is PB8253. Projector started, then afer a couple minutes it goes off with the red lamp led flashing.
Just replaced the lamp, but the problem persists. Tried to remove all connecting cables, except for the power, but still the same problem.
Anyone with similar problem or solution, please contact me at [email protected]