According to the company, the issue is specific to cameras with certain serial number ranges, and a serial number lookup tool will be available from July 23rd on Nikon's website to allow customers to determine if their own Nikon D5000 is affected. The problem relates to an electronic component which causes the camera to fail to switch on when using a fully-charged battery or the EH-5a AC adapter with EP-5 power connector. The issue is said to relate solely to inability to turn the camera on, with no safety risk posed, and no adverse effect on images captured before the problem manifests itself.
As well as the aforementioned serial number lookup tool, Nikon is currently preparing a service program to repair affected cameras. The company notes that it will cover the cost of shipping cameras covered by the program in both directions, and will wherever possible use two-day shipping to ensure the minimum inconvenience to customers. Both limited and extended camera warranties will be unaffected by the service. Note that Nikon is recommending customers not to take their cameras back to the dealer for service, but rather to use the service program once it begins so as to ensure the fastest possible service.
More details will be published on our news page once the service program begins and the lookup tool is available.