The parent unit has the option of using either batteries or a power adaptor. However, I don't have a second power adaptor. But if I run the parent unit on batteries (3 x AA), these get consumed very quickly, so I'm thinking of buying a second adaptor (£9 plus delivery).
However, I do have a spare D-Link power adaptor with the same voltage output rating (7.5v) and plug polarity (centre pin +) so I tried it.
It doesn't work.
So I took the Tomy power adaptor off the *baby* unit briefly and tried it on the parent unit. It works (inasmuch as the LED illuminates).
So why doesn't a non-Tomy power adaptor work? It's not broken. It's off my D-Link ethernet switch and it works fine on that.
The ONLY difference is that the Tomy adaptor is rated at 200ma, whereas the D-Link one is rated at 1000ma. Output voltage is the same in both cases.
Does the parent unit somehow 'know' that the D-Link is the wrong adaptor?