Optoma HD81 1080p DLP official discussion - Page 161 - AVS Forum
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post #4801 of 4819 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 4819 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 4819 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 4819 Old 04-03-2013, 12:58 AM
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Excellent. Thanks Jerry.
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post #4805 of 4819 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
a.k.a.
Mr. HiFi
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post #4806 of 4819 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 4819 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 4819 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 4819 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 4819 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 4819 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 4819 Old 07-23-2014, 05:38 PM
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Quote:
Originally Posted by JerryW View Post
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 4819 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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post #4814 of 4819 Old 10-07-2014, 04:39 AM
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Quote:
Originally Posted by Rycher10 View Post
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
I confirm this. I found this "Power on" button inside. It is here for service. If you power it on with it and plug something in the HDMI port it works fine.

I have bought a Null-Modem RS232 USB/Serial cable to try to control the lense shift and other functionnality. No chance, I don't know the protocol. I found the one for HD81 (non LV) but it does not work.
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post #4815 of 4819 Old 10-15-2014, 08:56 PM
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I was wondering if anyone had this problem:
My HD 81 has been working perfectly for several years, and 1700 hours on the bulb. I turned it on the other day, it ran fine through the startup process and picture startup, then shut off. After cycling the AC, it worked for a bit longer one time, but now it just does the same thing...turns on, powers up, then off.

Any help would be appreciated!
Optoma say they don't service these any longer!

Thanks, SebasSF.
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post #4816 of 4819 Old 10-16-2014, 05:33 AM
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Originally Posted by SebasSF View Post
I was wondering if anyone had this problem:
My HD 81 has been working perfectly for several years, and 1700 hours on the bulb. I turned it on the other day, it ran fine through the startup process and picture startup, then shut off. After cycling the AC, it worked for a bit longer one time, but now it just does the same thing...turns on, powers up, then off.

Any help would be appreciated!
Optoma say they don't service these any longer!

Thanks, SebasSF.
Stupid thing to check is the HDMI and serial cables. If they aren't making a perfect connection they will cause the projector to shut down. Worst case scenario, I could sell you mine as I just fell in love with the Epson 6030 at a friends house.

Why is there NO perfect equipment, only compromises?
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post #4817 of 4819 Old 10-16-2014, 10:11 AM
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yes, Optoma seems to think spending $1000+ per year on their mediocre projectors makes sense for the consumer.
This is my LAST Optoma product.

Anyway, you don't tune in to hear me rant.
1. Check or just replace the rs232 cable. If that stops communicating the projector shuts off as far as I can tell.
2. Open the controller box and blow some air across things. Don't use too high pressure air. I find this helps me.

Mine shuts off at seemingly random intervals. Usually shortly after startup, but sometimes after an hour or more. Blowing air seems to help for a few days anyhow.
I'm going to open mine up and wire in some switch and see if I can bypass the controller. But I watch movies with a scope screen and external lens and need to stretch the image vertically to compensate. If I use the computer I can do it there, but my bd player has no option to do that so I'd have to use the controller box anyhow.

Scott Stephens
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post #4818 of 4819 Old 10-17-2014, 02:08 PM
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Thanks for the feedback and ideas. I took the controller out and blew it out...looks clean and new on the inside. Checked all the cables and connections...looks fine. Reinstalled, but still the same problem. Frustrating that I did not touch anything, and it turns on and looks perfect until it turns off! I guess next up is to remove the projector and check it out...a real pain as its in a lift with the mounting screw only available from the top- a long crawl through the attic! Some of the newer projectors I'm looking at if this is a bust won't fit in the custom lift...should have made it larger I guess!

Any thoughts on how the hd81 compares to a newer hd25e?

Thanks, Sebastian
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post #4819 of 4819 Old 10-17-2014, 09:03 PM
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Ok, took a really nasty crawl and took the projector down. Opened it up and tested it using hdmi in and the service on switch...runs fine!
Bad controller I guess?
Any other ideas for controller issue repair?
Has anyone figured out a way to use the controller IR on switch and bypass some of the other parts so you can turn on the unit with controller IR? Figuring out a way to use the switch in the projector does not sound like fun...
Does image suffer without the controller?
Thanks, Sebastian
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