What is error code 66 for wd 65737 mitsubishi dlp tv

SOURCE: mitsubishi wd-62825 dlp

The WD62825 has a Digital Module located on the left side of the chassis looking at it from the rear of the set. It's housed in a metal box that can slide out of its holder after removing the trim screws.
The module has its own power supply board and there are a group of 16v/1000uf caps on that board which commonly fail causing the constant flashing standby light. Further back on the module is a small board about the size of a matchbook called the E2P module. Its SMT (Surface Mount Technology) caps also commonly fail which can cause the same symptoms. Techs can tell whether the E2P has failed by simply removing it, hooking the DM back up and trying to power the set. If it powers on the picture won't be much good - but at least you can tell what's keeping it down...
Back to the caps on the pwr board. If they've failed they usually will buldge visibly on top. And ESR is almost not necessary. In any event that's the nuts and bolts on this model.
Is it a job for a layman? Yes and no - you might strongly consider a tech if you don't feel comfortable removing all the connections that the DM has with the signal board. There are about six - multi-pin - wired connections to unplug and then sliding the DM out of the unit and carefully removing the screws and latching to take the DM top cover off...
Hope this helps.
Bill

SOURCE: need to align my mitsubishi wd-73733 dlp tv

We TV technicians don't go into alignment unless absolutley needed. I would stray away from alignments period unless you understand all of the ramifications that come with them.

SOURCE: problems with mitsubishi WD 65737

problem with mitsubishi wd65737. thought the bulb was bad, bought a new bulb replaced it and now the screen doesnt want to come on. light on the front of the tv turns green, you have sound but no picture then the tv turns off the light on the front is now steady red. resetting the sytem worked yesterday but not today.

SOURCE: I have a WD-65737 Mitsubishi DLP TV . Last night

iI just had the sMe isuue. your tv needs a system upgrade. Contact Mitaubishi and they will email the upgrade link. You will need Aa thumb dri.ve upto 4gigs to downlaod...ensure its empty. They directions will guide u. thru.

SOURCE: mitsubishi WD-65737 DLP TV. TV powers on, green

I had exactly the same thing happen..I contacted Mitsubishi and they said the software needs to be updated..they are going to send me the link to download the software.