White Hash Marks in Projected Image - AVS Forum
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post #1 of 4 Old 07-08-2014, 09:08 PM - Thread Starter
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White Hash Marks in Projected Image

Hi All,

I need to troubleshoot an issue with my Optoma GT750.

The projected image has developed some white hash marks lately. I'll attach 2 pictures. What is this? Is it the DMD chip going bad?

Thanks
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File Type: jpg 20140708_204037.jpg (106.4 KB, 10 views)
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post #2 of 4 Old 07-08-2014, 11:13 PM
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They look uniform enough, if they are always there I'd say yes it's a failing DMD. Optoma has a bit of history with helping these issues even out of warranty so I'd give them a call to find out if there's any chance of getting it fixed for cheap.
Even though your warranty may be gone, TI give manufacturers a 5year warranty on those chips so they can often afford to be lenient while TI handles most of the bill.

It doesn't happen every time, but it's worth a shot.
Good luck.
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post #3 of 4 Old 07-08-2014, 11:17 PM - Thread Starter
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Thanks for the tip. That's good knowledge to have, and I'll make them honor that.

Quote:
Originally Posted by Ftoast View Post
They look uniform enough, if they are always there I'd say yes it's a failing DMD. Optoma has a bit of history with helping these issues even out of warranty so I'd give them a call to find out if there's any chance of getting it fixed for cheap.
Even though your warranty may be gone, TI give manufacturers a 5year warranty on those chips so they can often afford to be lenient while TI handles most of the bill.

It doesn't happen every time, but it's worth a shot.
Good luck.
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post #4 of 4 Old 07-09-2014, 04:49 AM
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TI's 5year on the DMD doesn't mean Optoma has to give it to you, even for DMD failure..it only means that TI will supply Optoma with a new DMD in exchange for a faulty one if Optoma can argue for it. Optoma isn't technically obligated to help you, it just happens to be easy enough that they sometimes will for a surprisingly low price when they only have to pay for labor (if even that) while TI pays the parts and you are already paying shipping.

I believe most of Optoma's out of warranty help was for specific models where they used poor heatsink paste which was known to cause failure.

I'm just saying, try not to get your hopes TOO high.
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