Originally Posted by defeedme
wow Thanks for the advice! I'm gonna try and clean it up and re-install just to make sure..
NOBODY and I mean NOBODY has this chip - and I even checked with TI themselves and they told me they are on backorder until mid December. I'm thinking maybe they had some issue where alot of them were failing and they had to re-engineer ?
Yeah, that's quite possible.
But also check all possible physical connections.
The boards are usually sandwiched with each other and the pins connecting them might, just might, need to be reseated and sprayed with some contact cleaner.
I say that because from my experience with DLP PJs worked extra long hours (my HT2050 is nearing 30000 hours), I see the actual DMD as the less likely failure suspect. I've never seen it being damaged yet.
I suppose, there should not be many things that physically can kill a DMD.
The list should be short: excessive thermal stress from the actual light engine and inadequate heat dissipation from the cooling system.
So basically, other than other that, the mechanical hinges those mirrors are hanging from, should be heavy duty and long life.
Another possibility is that a nearby IC which communicates with the DMD to be blown.
Look for things like the scaler board and any other visible passive part that might be looking suspect.
A schematic or a Service Manual will give you insight.
In the end, if you single out it is the DMD chip, I am afraid it can be pretty expensive.
Is it worth it to invest in such a part?
I know how lovely it feels when you refurbish a device, but it is always a matter of cost as well.
Hope you can figure it out!!
By the way: Mouser also lists the part as Obsolete.
Bad news I am afraid mate..
That is the worst thing it can happen to a service project.