We have a vista 40
Hi, well i suspect that when the power went either out, or more likely when service was restored, the device suffered a "Power Spike, Surge, or Transient" This is an all to common thing, most people do not know how imperative it is to UNPLUG ALL electronic equipment, after the power outage, and only connect a little time AFTER re-connection to avoid any "Nasties" that will occur at the time of and soon after power is reconnected to the grid. Sensitive electronics can and will be damaged by these events as has been evidenced here.
Most likely the power supply unit is damaged, however it may indeed have gone "Deeper' into the electronics without examination one simply cannot tell.
In, my experience, over the many years, these instances i cannot recommend repair, as most often, the very damage done is of a nature that precludes repair, and demands replacement only.
A surge or spike buster device may, assist and are a worthwhile addition, and should always be used regardless on electronics connected to the Mains, however ALWAYS remove totally the connection, in future instances of power outages, to stop this from occurring again.
on Feb 20, 2012