Some suggestions if the projector doesn't turn on.
- Unplug the power cord. This resets everything in the projector.
- Remove & replace the lamp unit. This can reseat its power connection.
- Wait 30 minutes to ensure the projector is reset, then reattach the power cord.
- When you restore power, are the LEDs on top of the projector blinking? If so, the manual gives you a decode guide.
- If the lights aren't blinking after reconnecting power, then press the power button on top of the projector.
- Are the lights blinking in a pattern now? If so, use the manual to decode.
Recently received my neighbor's DLA-HD1 when I saw it gathering dust on a shelf in his garage. It had died and local shop couldn't repair it. Told him I have a hobby of fixing high-tech stuff without a deadline, asked for it. He was glad to give the useless thing to a good home.
Finally found and fixed the problem, now have a nice PJ, AV receiver (he upgraded his AV receiver when he bought the replacement 3D projector), screen and replacement lamp. At $0 purchase price. Will go into daughter's basement when her husband finishes the remodel. A very motivated man. Plus earned a few father-in-law credits.
After trying to fix several things that weren't broken, came down to the lamp hatch cover switch. The long finger coming off the bottom of the hatch operates a small switch inside the case. Lamp would start warming up, turn off and projector LEDs would blink. Finally decoded them, concluded it was some sensor warning the PJ that the lamp wasn't properly covered. Disassembled and found two candidates, fixed both.
The neighbor's late wife was a smoker, cigarette smoke probably fouled the switch contacts. Removed the switch. Blew compressed air into all its little niches, gently operated it from limit-to-limit about 20 times to try to clear things out. Reassembled and the projector works. Very satisfying.
Also cleared thick haze from the fresnel lens surface. Probably cigarette smoke baked on by the lamp's heat. Used a microfiber cloth barely dampened with distilled water.
The other candidate for "exposed lamp" is the black plastic piece covering the top of the passage between lamp and fresnel lens leading into optics. I bent its two copper fingers to ensure they made solid contact with the steel covering the optics portion.
When you replace the fan in the air duct during reassembly, ensure it's facing the correct direction. The shiny label at the fan's center should face the exhaust duct. There's also an indicator on the edge of the fan with two arrows at right angles. One shows which way the air will be blown, the other shows which way the blades spin.