Hey
@tommywill -
Good catch! Yes - it’s been remarked on in quite a few threads that
only an OEM p/supply should be used on a DP…
The reasons given are mostly about
noise problems, not power quality.
And I’ll vouch that in my decades of using all
kinds of music gear: I’d guess that I had or acquired the original/OEM p/s maaaybe 20-25% of the time,
TOPS. The rest of the time I used off-brand/generics, including a bunch that were inarguably cheep chinese junque!

, or were made for some other type of device/equipment altogether.
In most cases, they worked well enough; if they didn’t (like being to noisy) I’d just get something else, & use the noisy one to power something where noise
wasn’t an issue.
That said: my DP-32’s p/s IS the originally-supplied Tascam-brand brick. Works flawlessly…
But if I had your problem (and being a man of pretty modest means) - I’d be inclined to ho the above-mentioned “process of elimination” route (even if it meant buying an ultimately unsatisfactorily noisy aftermarket cheapy p/s) just to see if it resolved the bee-zarr problem you’re having…again - cheaper than sending the unit in for service, and a chunk cheaper than the Tascam p/s.
Even if the cheapy one proves your problem was a wonky p/s, yet proves too noisy to use - you can still buy the pricey Tascam one, have your problem resolved AND have a nice quiet p/s…and STILL have spent 1/4 (or less) of what a Tascam servicing woulda cost. AND a spare p/s to run something else with.
That’s my $0.02; I just know I’d be crusheif I had to give up DO for a couple montjs and pay them hundreds of bux, just to have them tell me it was just a bad p/s! I’d sooner do some exploring/diagnosing myself…
Sorry for the long winded rant. Good luck - keep us posted!