Optoma HD81 1080p DLP official discussion - Page 161 - AVS Forum
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post #4801 of 4813 Old 04-02-2013, 01:58 PM
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Ok, thanks. When it arrives I'll give it a tap like it says above and see what happens. It alegedley was dropped on the floor and stopped working. I had an 81LV in the past and regret selling it.
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post #4802 of 4813 Old 04-02-2013, 01:58 PM
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Art, I'm with you, I still haven't seen an LCOS three panel that does it for me, except for the very good CR. I hope you get a chance to see a Runco LS-3 or LS-5 single chip DLP projector. I am absolutely delighted with my LS-3 and short throw lens. It is a more sophisticated image than the HD81-LV, fantastic color, much better CR due to auto iris/bulb control, no RBE compared to the Optoma, great scaling, no banding, good lumens. Most film like image I've seen at the price point. Bought it in June and it has not had any issues whatsoever, unlike the O brand. Optoma service took good care of me, but the products were lemons. I must have gone through over a dozen HD-81/HD81-LV/HD80 units, some serial numbers kept coming back to the refurb pool and to my home theater, with the same issues I returned them for in the first place. The only artifact I've seen with the Runco is occasional flicker due to the AI on flat fields--very subtle and the AI does have a slight effect on color, but even when off, the CR is pretty good.

If you don't want to spend for a new Runco, hunt down a used Planar 8150 or 8130, same projector as the Runco LS-5, LS-3, except for a different scaler. I'm just sorry I didn't dump the O projectors sooner. I am over the moon with the image the LS-3 is giving me! I often watch raw footage of projects I have shot with high end video cameras and the image is very similar to the calibrated broadcast HD monitors I use on set, except with a more subtle, film like quality. Every year I look at the newest JVC model and every year I'm happy that I stayed with single chip DLP, but only the larger DMD size. The .65 is softer, like the LCOS projectors.

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post #4803 of 4813 Old 04-03-2013, 12:47 AM
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Quote:
Originally Posted by clubbedougan View Post

Ok, thanks. When it arrives I'll give it a tap like it says above and see what happens. It alegedley was dropped on the floor and stopped working. I had an 81LV in the past and regret selling it.

You can try connecting the HDMI directly to the projector and the VXD just to the serial port. The VXD can fail in different ways - mine stopped passing video but the controls for powering on and such still worked.

Failing that, if you have a linux computer I can give you some software that I wrote which will allow you to power the projector on and off via the computer's serial port (I use a USB to rs-232 converter). If you find that you could use it, send me a PM because I may not notice a post in this particular thread.

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post #4804 of 4813 Old 04-03-2013, 12:58 AM
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Excellent. Thanks Jerry.
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post #4805 of 4813 Old 04-03-2013, 08:52 AM
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If the VXD will not start, Jerry's method will not work. I hope the Linux program works for you.

Art Neill
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post #4806 of 4813 Old 04-03-2013, 01:30 PM
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Got it today, looks like its been in a car crash. Lid was tight, don't think it has ever been opened. Clean inside. No cables. Is it a standard rs-232 null modem cable I need ?
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post #4807 of 4813 Old 04-03-2013, 03:17 PM
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I am using the cable that came with it, but I experimented with it a couple of years ago and I think it is a null modem. Not anywhere near 100% confident though.

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post #4808 of 4813 Old 04-04-2013, 04:04 AM
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The label on the base says 'HD81 DLP Projection Display' nothing about LV. Is it an LV model then?
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post #4809 of 4813 Old 04-07-2013, 06:56 AM
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Does the label/plate on the base of an HD81LV say HD81LV or just HD81?
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post #4810 of 4813 Old 06-18-2013, 05:34 AM
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right,Thanks for all the great info - keep it coming! lJNb
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post #4811 of 4813 Old 12-31-2013, 04:44 PM
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Sorry to bump such an old thread but I was able to fix my HDMI problem (none of the HDMI ports worked) by using an EDID cheater . I connected the cheater straight to the projector and used the clone feature, then I installed the cheater between the "to receiver" and "from receiver" ports where the short HDMI cable goes. I guess the part of the projector that outputs EDID died.
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post #4812 of 4813 Old 07-23-2014, 05:38 PM
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Quote:
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Quote:Originally Posted by clubbedougan 

Ok, thanks. When it arrives I'll give it a tap like it says above and see what happens. It alegedley was dropped on the floor and stopped working. I had an 81LV in the past and regret selling it.


You can try connecting the HDMI directly to the projector and the VXD just to the serial port. The VXD can fail in different ways - mine stopped passing video but the controls for powering on and such still worked.

Failing that, if you have a linux computer I can give you some software that I wrote which will allow you to power the projector on and off via the computer's serial port (I use a USB to rs-232 converter). If you find that you could use it, send me a PM because I may not notice a post in this particular thread.
Hi there. I am wondering if you could help me. I have an optoma hd81, but I dropped the controller box and now it won't communicate with the projector so can't turn my projector on. Do you still have that program for Linux or better option, do you know how I can turn the projector on through windows?
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post #4813 of 4813 Old 09-28-2014, 07:05 AM
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I just received an HD81 projector and the controller from a friend. When connected together the controller had no response other than a blinking red power light...nothing else. The projector had a solid red power light and blinking blue lamp light. No other functions would work....no power, no light from lamp, nothing. I am using a 50 ft length of male to female serial cable with a gender changer on one end if that matters. I've read all the issues about the lamp dying early, or the controller's HDMI problems, or the controller dying early as well. I don't really need the controller as my pioneer Elite receiver handles all the HDMI switching for me, and I was looking for a way to connect the receiver directly to the projectors single HDMI input and let the receiver handle everything else. Problem is that as it is the projector and the controller are married together with that serial cable and neither will work independent or each other.....or so I thought.


I opened my projector to see if I could find a remote IR sensor connection so that I could just rig an IR blaster to control power on/off. What I did find inside the projector are 3 surface mount momentary switches - one of them being a power on/off switch. I connected my bluray player directly into the projectors single HDMI input, left the serial cables unplugged, and pressed that little power switch.....BAM! The projector powered up just fine and was playing my bluray with no issues, and more importantly without that POS controller. Better still is that all previous calibration and color settings have been retained inside the projector! So at this point I purchased a small momentary switch and soldered 2 small wires to the switch on the board itself, and mounted that switch on the rear of the projector panel. Sure, I have to manually turn on the projector by pressing that new switch, but a $2.00 switch, and the removal of that processor, I think I can live with that.


I'm still trying to figure out a way to get am IR sensor attached to the projector. There has to be a plug somewhere inside as the HD81 and HD80 are basically the same units and share the same interior, and the HD80 has the sensor. Finding this IR sensor is the only way to access the projectors color settings, etc.


Anyway, easy fix if you lost your processor, and a definitive answer about the projector being used without the processor - it can be used standalone without the processor.


Jimmy
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