This is one of those phones that doesn't have much support when it comes to factory reset, troubleshooting and diagnostics. The first thing to do when you received that error is to reboot it and if it's possible remove the battery as well. Leave it like that for a couple of minutes then plug it back and start it. If the same screen is shown, then you have to take it to service repair. For devices that are under contract, take advantage of the warranty service else visit a local phone service shop and they should be able to repair it for you.