For what it's worth

I've just had the third of these units pack in because the power supply has failed. The spec makes it difficult to find an exact equivalent affordably - 5V dc is common, but 2Amp is the challenge. So all three units have gone in the bin. What a shame.

In case this helps anyone: the plug has a diameter of around 4.5mm and centre is positive. The original has part number GPSA 0500252 or JTA0302D-C (I have failed specimens of both)