how do i fix my motorola c290?

can i please have step by step repair instructions for my motorola c290 cellphone?
Everytime i turn the phone on the Bootloader usb ini screen comes on and nothing else happens. is there a way to repair this and have my phone back to the way it was? With the same phone number and memory (phonebook specially)
this is very important. Its a work phone and many important numbers and messages are stored in it.