You might try substituting power supplies if you have a suitable unit to change.
My OBi202 specs are DC: +12V 1.0 Amp Max, and the others look to be the same. So compatible power supplies are pretty common, I think.
If you are still under warranty, then I would contact OBi. If out of warranty, I would swap power supplies with another before buying a new unit.
My OBi202 costs about twice what I save per month vs my old wireline phone. Maybe I should buy a spare. However so far, I am problem free, and I have the cell phone to hold me over if there is a failure. A new OBi100 is $40, so you could go ahead and order, and at worst have a spare if you find the problem is something weird. I cannot imagine khubbell 's OBi+powersupply has not failed based on the symptoms. CarlosDanger, I am generally skeptical of "same", but if so, you should get yours on order too.