Nokia n95 8gb turns on no screen

hey,

i have a nokia n95 8gb. the phone screen died so i got a new one put it into phone still wont work, when i turn the phone on the screen lights up white for 2 seconds then goes black, but phone starts up i can hear it starting up and my key pad lights up.

i notised the battery connecters was loose so i got a bran new battery but still have the same problem.

can link it to pc and works just cleaned the files up.

any ideas on the problem. thanks

i dont even get the nokia sign just white screen