I have a Mitsubishi WD-73640 with a flashing green light. How do I fix this.

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: Mitsubishi WD-62628 power shuts off!

I have the same issue have not done the repair yet but here is a link to photos of the various boards and the problem caps:

http://www.fixya.com/support/t155026-
flickering_blue_picture

SOURCE: Mitsubishi WD-62725 constant blinking of green light

Check the lamp to see if it is damaged(this is in your owners manual for removal)If not please contact me for more info

SOURCE: mitsubishi wd-52628 flashing green timer light

If the power/timer led is the one blinking constantly
the most likely problem is two 3300 mfd caps and 1 to 8 1000mfd caps on the power board.
could be the DM board or caps on it as well.

SOURCE: mitsubishi wd 52825 tv It wont

it is common for a cuircit board called the dm(digital module) to go bad in these units. this set has a keyboard lockout feature.

Press menu for 10 seconds on front panel. if that does not release control then u more than likely have a problem with dm module. there are several bullitens about this and several things a tech can do to repair this set.

by willtab

just a head's up, getting this repaied my cost a little big.

good luck