My SheevaPlug died yesterday and I didn't even have an external HD attached, just a USB stick. Maybe the weather was too hot . I didn't even bother to open the silver box (also because of the warnings here) because the blinking LED symptoms were pretty clear.
Following the instructions of SunnyJim and oswald31, it's running again! After slightly enlarging the figure 8 plug connector hole, the jack fit in perfectly.
Maybe the following is helpful for some people with the same problem that are similarly unexperienced as me with this stuff:
- It's actually okay to connect both the red cables to positive and both the black cables to negative, as shown on some of the photos here. I.e. it's okay to connect each pair to the same pole with the same voltage.
- If you get one of those jacks with a switching contact, you don't need to connect the switching contact to anything.