So my 65HM167 is well into Constellation Mode (where the DLP chip is dying, one mirror at a time). A replacement chip is pretty reasonable (~$150 and a DIY job), but some places online imply that Toshibas may also require a whole new DMD board. I've poked around (and emailed a couple places) but haven't gotten a straight answer about that, or if it's true how much it would cost or how much of a DIY job it would be.
Has anyone here replaced a Toshiba DLP chip? What was your experience?