Welcome to Android Central! Can you show a picture of that screen?
http://forums.androidcentral.com/gen...d-central.html. It might be a "Download Mode," which is intended for download of a firmware file via USB connection from a PC. Sometimes, if there's a firmware or hardware glitch, a device can boot into Download Mode. Or it could be a button problem, since the button sequence to get into Download Mode is usually something like pressing and holding Power and Vol Down together during the boot process.