I have the same problem. I open the unit and replaced the fan. I found the computer chassis fan compatible (60MM X 60mm) from E-Bay for $5.00. It is now working find again. This is for those who will encounter the same problem of the fan not working.
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I have a similar problem. JVC Project (DLA-RS1) shuts off after about 30 min to 1 hour of use. Everything turns off - bulb, fan, even the little light on the projector near the buttons. After 10-15 min the red light comes back on and you can start the projector.
I have seen this happen when I had installed a knock-off bulb. I believe the bulb runs a little hotter and the projector over heats. Now I am seeing it happen even with a JVC bulb.
I am in the process of taking the cover off the projector to see if anything is blocking the air flow (like a piece of broken bulb, which did break a while back). If a problem doesn't show up there I am going to check the fan to see if it is turning at full speed (maybe replace with a beefier fan?).
I think it's a lamp driver issue from what I've seen others have gone through. I also read that if you go through the sequence of unplugging, plug back in, wait 20 seconds and try to turn on, multiple times, it will finally kick on and work. I just got mine to turn back on by doing this and waiting through the fan cycling without the light turning on. After the 4th sequence the light flickered. After the 7th sequence it finally turned on and is working. Now I can watch the Super Bowl and will look into replacing soon.
A hornet had built a nest in the cooling fan. this stopped the fan spinning. I removed the nest & re-assembled the projector. Now working fine. Also, as it wasn't the bulb, I now have a spare. Think I'll keep a cover over the unit when it's not in use so no more hornet nests appear.
The reason why the temp comes on because the fan is start slow down, so the bulb produce a lot of heat. Once the maximum temp reach, the temperature sensor will become inactive. So boxlight shutdown. First you need to replace the fan, or check the supply dc voltage going to fan if it is stable.
The fan has again got burnt out. Try replacing with the fan of the Benq Brand or a compatible one as depicted in the manual or contact: Headquarters 16 Jihu Road, Neihu, Taipei 114, Taiwan Tel: +886-2-2658-8880 Fax: +886-2-2797-9288 or check up the address from the net regarding your country's support or Authorized representatives close to you and get the details mailed back.................sodeep
I have the same issue, I have figured out its a fan issue, my fan must have went out. After about ten minutes the bulb will get too hot and the picture will start to turn a way off tint color. I put a fan on my projector and after about 40 min. the picture returned to the appropriate color. I am still investigation on how to get and replace the fan.
I generally fix this by re-seating the bulb housing. Take it out and put it back in. Look for cracking at the base of the bulb on the mirrored surface. It could be a barely functioning bulb that isn't busted, but can't initialize. I would take it to a shop that has the same bub type in a housing and make a quick switch.
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.