cwispy is probably the best person to answer this one or give some advice.
The 2.09 are a non flashable cam and cant be software upgraded as far as I know. I am using one in a DM7020 and have started to get the odd slight pixelation and am now wondering if it is cam related after reading your post.
I have 2 of them , so I will swap them around and see if I notice a difference.
For what they are worth , replacement is probably a cheaper option than repair.
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