I think it's a different design, the DM7025 had a different PSU than then DM7025+ (that is a DM8000HD PSU)

We have a solution here, for DM8000HD PSU, but generally the original PSU seems to work better than the clones one that are discussed on this topic, I let you read it but best is really to open a topic about this issue, talking about the possible PSU problem to Johnny at http://jb8a8f8.com.

Topic about DM8000HD PSU Clone problems : http://www.ourdreambox.com/ubbthreads.php?ubb=showflat&Number=1592#Post1592

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