In light of the color wheel failure in my HD70 I was forced to find a replacement.

I have to commend Optoma. Despite their somewhat snippy customer service rep, I am really impressed. I called them four days ago (Monday) after they had closed for the day (why answer the phone if you’re closed?) and ordered a replacement color wheel for my HD70, a projector they haven’t made for about four years. Not only did they have it in stock, and for a reasonable price, but they told me it would be 8 days to arrive and it arrived in less than four. Color me impressed.

After I opened the projector up, pulled all the glass shards out, blew the dust out of it, and installed the new wheel I buttoned it back up, sure enough it fired right up. The only note I can really give to others who attempt this is not to forget to unscrew your color wheel sensor (an optical sensor) from your original color wheel and attached it to the new one before installing it. If you have ever noticed “a dirty color wheel,” manifested by your screen flashing odd colors (usually green), you are actually dealing with dust interrupting the view of this sensor.

I have never been happier that I purchased an Optoma projector, and I won’t hesitate to buy another (when funds permit I’d like to get the HD80 or HD33). When this projector was new the retail price was around $1299, and it was widely thought of as a bargain for a best-in-class unit. I got mine all beat up and not working on eBay for $200. I added a lamp ($245 at the time) and did some cleaning and sealing of ducting and had a working projector. Thanks to Optoma for building us a durable workhorse  that we can repair ourselves!

From Ezra Moore

I was watching an old episode of Dexter the other day (I know, I’m late to the party) and my projector (an Optoma HD70) image became an off color for just a second, but most alarmingly started to make a terrible buzzing/whirring/grinding noise, almost like a bad computer fan.

There are a couple of high volume brushless DC (computer) fans inside there, so I knew it was possible that one had thrown a vane. Since the HD-70 is a DLP projector it uses a complex set of mirrors to reflect the image through a color wheel in order to get the correct colors displayed in the image. The color wheel in the HD70 is seven segments. I believe that it is ordered red, green blue, white, red, grean, blue. When I heard the noise I shut the projector down as quickly as I could, and the color shift that appeared along with the noise only lasted a split second. For this reason I think that my color wheel simply lost its white (or clear, if you prefer) segment. When I pick the projector up and move it around I can hear a piece of what sounds like glass moving around.

When I bought my projector it needed a new lamp and a thorough cleaning inside. I got a great deal on it, so that was no problem, and I ventured inside the box to get it all taken care of. I am completely comfortable opening the case and working on the internals. What concerned me was that no matter how hard I Googled I couldn’t find anyone selling a replacement color wheel. I even found the Optoma part number for it (70.85S22GR01, by the way), but even searching for that yielded few results. I have one hit from Alibaba, which has been an unreliable source for me in the past (and often requires that you order 10-100 of something you only need one of) and one for a website that I had never heard of that wanted $300 for the color wheel. If I was going to have to pay $300 I was planning to upgrade to a new 1080p projector (HD80/22/33, something along those lines). Sure, it would have cost a lot more, but this projector is outdated now, even though the image quality and reliability are both excellent.

My next resort was this thread (second page) on AVSForum, where someone had kindly posted a phone number and quote from Optoma. Sadly, that number didn’t work for me, disconnected. So as my last resort (before pinching pennies for a new/used machine) was to call Optoma. I’ve never had good luck getting companies to sell my internal non-user serviceable parts directly, nor have I had luck with ordering parts for out of warranty/support machines, but the projector gods were on my side today. Optoma sold me a new color wheel for $50 plus about $12 to ship it (FedEx Ground) to me. I tried just about every number on their contact us page, and finally got to a message that said ‘for out of warranty machines please call (888) 942-2929, and that is what I did. No lies, no weirdness (the lady wasn’t very nice, at all), and I got my part. Once it arrives I may post some instructions/pictures of the replacement process.

From Ezra Moore

UPDATE:
When I wrote this the other morning I failed to identify the usefulness of the following procedure as it applies to the overall removal of the Antivirus XP, et al.

The instructions below deal specifically with the scenario in which the rogue software has disabled the launching of executable or .exe files. This is a common practice on the part of the rogue software developers, because it limits your ability as a user to initiate many countermeasures.

My preferred malware cleanup tool is MalwareBytes, though my complete procedure involves several applications, the exact combination of which varies from infection to infection.

For reference I prefer:

Sunbelt Software’s VIPRE – Paid General Antimalware
Grisoft’s AVG Free – Free General Antimalware

* I do believe there is a difference between paid and free antivirus protection. The main differences lie in the features of the application and the support available to a user if a problem arises. I feel there is no advantage to a paid solution from a definitions standpoint.

How to use the instructions below:
These instructions assume two things.
1. You have been infected with one of the Antivirus XP/Vista/7 variants.
2. You are unable to run executables as a result of the infection.

How to restore your ability to launch executables:
1. Start | Run| type ‘command.com’ to launch DOS command prompt.
N.B. This opens the old-fashioned command prompt, thus TAB does not auto-complete folder names, and the up arrow does not reenter the last command. Most importantly you must use eight character folder names. See step 2.
2. Run ‘dir /x’ to reveal 8 character folder names.
3. Open ‘notepad.exe’ from the command prompt.
4. Input:

Windows Registry Editor Version 5.00 [-HKEY_CURRENT_USER\Software\Classes\.exe] [-HKEY_CURRENT_USER\Software\Classes\secfile] [-HKEY_CLASSES_ROOT\secfile] [-HKEY_CLASSES_ROOT\.exe\shell\open\command] [HKEY_CLASSES_ROOT\exefile\shell\open\command] @="\"%1\" %*" [HKEY_CLASSES_ROOT\.exe] @="exefile" "Content Type"="application/x-msdownload"

5. Save the file as ‘registryfix.reg’ to the desktop.
6. Open the ‘registryfix.reg’ file from the desktop to merge these changes into the registry.
7. Load MalwareBytes from local source (flash drive, CDROM, Ext. HDD, etc.)
8. Run MalwareBytes per normal procedure.

From Ezra Moore