Originally Posted by
Bulls729 
I Google'd that for you
HERE, Google is a webpage that resides outside of AVS, can you believe that?!
Which brought me to this link
here
Within that page I found the update file and instructions. I went ahead and put the file on a mirror to save you the trouble.
Mirror:
MediaFire
Not only that I copied and pasted the installation instructions:
"get or borrow a USB thumb drive to put the files onto. The drive should be formatted as FAT(32) filesystem. If you aren't sure, just copy the contents off your favorite thumb drive, and reformat it as FAT. You can easily re-format and copy your files back onto it after you're done (in 4 minutes from now).
It doesn't matter what your thumb drive's volume name is -- I named mine WD73833-903 and it worked fine.
Next, unzip the file you downloaded above onto the top level of the thumb drive. (In other words, either copy the ZIP file on the thumb drive and deflate it in-place, or deflate it on your computer's hard drive in a folder and then drag/copy the contents of that folder to the top level of the thumb drive volume.)
Eject the thumb drive gracefully from your computer, but do not plug it into the TV yet. The TV must be powered off before you plug it in. (It turns out the TV looks for new firmware on the USB port only during its power-up cycle, read on.)
Next, unplug the TV from the wall (not kidding; just turning it off won't work). If you want to gracefully shut the TV down, that's fine, wait until it's completely powered off before unplugging it. Just whatever you do, don't plug the thumb drive into the USB port until you've unplugged the TV from the power outlet.
With the TV unplugged, put the thumb drive you copied the files onto above into the front USB port (just inside the door on the front of the TV where the other front-loading ports and controls are).
Plug the TV back in (but do not turn it on). Immediately, because the thumb drive is plugged in, you'll see the timer light start flashing rapidly. This indicates that the thumb drive was successfully mounted and that the TV is applying the firmware update automatically (you don't have to do anything else, just wait). Note: if you plug the TV in and the timer light doesn't start flashing within a few seconds, check that you correctly pushed the thumb drive all the way into the USB port and then unplug and re-plug in to the power.
Wait patiently for approximately 3 minutes -- you'll get no feedback aside from the flashing timer light (and if your USB thumb drive has a light, you may see the light flickering meaning that it's being read).
Once the firmware upgrade is installed, the TV will power up automatically (you do not have to turn it on, it will just come on).
At this point, you'll have 9.03 assuming all went correctly. You can confirm this once the TV is warmed up, by clicking menu on the remote, and looking in the upper right side; it should say 9.03.
At this point you should no longer see the blue screen when you are using the 3D adaptor. Getting it to actually work is a whole separate issue, not covered here. This is just for updating the firmware. Good luck with actually enjoying 3D from Playstation III, DirecTV HR21 and above, and other non-checkerboard sources.
Please help out your fellow 73833 owners -- unlike all the folks in the past who've just posted that they got it working without saying how or providing the damned zip file (!!) -- please actually link to this post if it worked for you, and to the corresponding ZIP file, so we can get the word out. Mitsubishi should have put these instructions online long ago, and should have included this and a warning about the need to upgrade the TV's firmware in their compatibility information for the 3D adaptor. It's hard to understand why they didn't, since it's so easy to do this if they just gave you a simple download. So please help me help everyone like me and post the link to this everywhere you can. If Mitsubishi is unhappy about that, I'm sorry for them."
/Sarcasm
