My HD19S developed a weird white smudge about a month ago. I was hoping it was the batteries since they had some hours on them, but after changing the batteries out with multiple sets of new batteries still no change. Actually seems to get worse the longer the unit stays powered on. Sellmark customer service replied to my email quickly and I now have a return authorization. Going to ship it next Tue/Wed after the holiday weekend has passed. Fingers crossed! (Pictures are not the best but you can see the white smudge towards the lower left.)
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