I have dots slowly starting to appear on my wd-73735. I bought the tv in February 2009 and the light engine had to be replaced once in September of last year. now what do I do?

This issue has nothing to do with the display. Problem is "stuck" mirrors on the Digital Mirror Device. Mitsubishi's option is to replace the complete optical engine, but TVLAMPSFORLESS.com has the actual DMD IC available under "Mitsubishi 938P126060 DLP Chip". As a Mitsubishi ASC for more than a quarter-century, have had several opportunities to replace these devices for COD & 3rd-Party Service Contract Provider customers with great success. This issue has nothing to do with the display. Problem is "stuck" mirrors on the Digital Mirror Device. Mitsubishi's option is to replace the complete optical engine, but TVLAMPSFORLESS.com has the actual DMD IC available under "Mitsubishi 938P126060 DLP Chip". As a Mitsubishi ASC for more than a quarter-century, have had several opportunities to replace these devices for COD & 3rd-Party Service Contract Provider customers with great success.