I recently purchased an HC4900 for £200 (a bargain in my books). The picture seems good but I do have a couple of 'football' splotches from dust on the sensor. They're mainly visible against pure black. Having read around on here I learned that kicking the lens out of focus reveals the true state of the sensor dust and found there are literally hundreds of specks.
My question is how easy is it to strip the projector down and clean the sensor (or is there another trick)?
I understand the v4 of the firmware ramps the fan speed momentarily on startup in an effort to remove dust but I'm on version 1 and haven't been able to source the newer firmware (Mitsubishi won't email me it).
There's also signs of dust build up on the lens elements. Is that easier to clean?
I'm assuming the outcome would be a cleaner and brighter image. Is that correct? Is it worth the endeavour or could it easily go horribly wrong?