Has anyone a copy of the HD70 Schematics

Most likely the lamp cover switch

It will be worthwhile to test the lamp on another unit or at a test center to confirm as the fault seems to represent a faulty lamp. If this is confirmed then the we can proceed to access the voltage on the lamp , if so the trip is due to low delivery from the power supply section and so it trips on loading of the lamp.

hi,
Do the following for reset the lamp hour.
1. Press the menu button
2. Select Options.
3. Select lamp settings
4. Select lamp reset.
5 Select Yes
ok

There is a switch on the side where you insert the lamp, it's black with a metal contact. If, when the lamp cover is replaced, it does not "activate" this switch for some reason (i.e. it is loose or perhaps bent) then the projector will not power at all.

Just remove the lamp and take a look at the switch for possible damage incurred from when you replaced the lamp.

Asher fadida and alll,

The issue:
solid red error light?
HD70 "die's" after few min with strage noise?
flickers different colors before complete self shutdown?

well try this....

Before replacing your bulb, fan or any other component try first cleaning your optoma realy good!! HD70 doesnt comes with any kind of filter so you can imagine the amound of dust can be.
The most importent thing is to blow away any dust from your color wheel + the sensor attached to it .

for farther troubleshoting clean your fan's.
there are 2 fan's insinde the HD70.

probably the most problems will be solved by cleening the color wheel!!
if the problem is not solved ,chack the lemp and the fans if they work properlly.

For fan replacing:
Fan Part number: GM1207PKVX-A



Good luck!!

In most projector menus there will be an option to reset the lamp timer, it's usually under the "settings" area of the menu. Try resetting the lamp timer and the light should stop flashing.

unscrew the screw on the lamp door, unscrew the lamp screws, pull the lamp out, replace with new lamp (making sure it's securely plugged in), screw it in, replace the door, plug the projector in, turn it on, enjoy!

reset the settings to factory default ans check the lamp hours. if it's close to 2000, replace the lamp. otherwise, it just may be dirty. blow it out with canned air. if it's still a problem, replace the colorwheel.

Sounds like there is a overheat sensor failed in this unit in the lamp balast sure a cloaged filter could heat the unit as well so yeah check that..

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

You didn't include much information other than the lamp not coming on. Here are a few things to try, if you haven't already. Unplug the projector and allow it to sit for a minute or two. Try removing/re-installing the lamp assembly. Sometimes especially after a lamp change the bulb/contacts are not properly seated. Ensure the screws are securely fastened to keep the bulb seated. Are there any lights, i.e. power, bulb or fan errors lit? I've had my HD70 since 2006 and use it everyday for my main television. PS3, DVDs and Cable all run through it. I average one bulb per year and about 3100 hrs on each bulb. My last bulb actually lasted 3600. I have tried all the above and each has worked at some point. Hopefully you can have some success.