Naveen, I had the same problem.
On the first MBP i received (I say first, because I eventually had to return in and have a replacement sent to me) the fan is unusually loud. I could hear the fan whirring and the exhaust pumping air out like I'm running a lot of applications at a go, when in fact I had only launched Settings.
I gave Apple a call and they ran through some troubleshooting (SMC reset, PRAM or something) and eventually, the fan did quieten down. As a final check, the specialist told me to reboot the computer on SafeBoot to make sure it was all running ok.
Then it happened- the screen started "misbehaving". the graphics were distorted, like horizontal blinds moving up in waves over and over before it settled down into SafeBoot. I got transferred to Technical Assistance and from there, I worked with other specialist and spent 2 entire days troubleshooting before it was decided I will have to have a replacement.
Guess what? the replacement (this one i'm using to type this message) has the EXACT same problems: a loud fan, graphics card problems, AND the volume is really low on this unit- at halfway past the volume rocker range, I can barely hear anything! (notifications, movies, music, videos on YouTube, etc).
I scheduled another call with Apple Support. I'm at wit's end too. Just disappointed and frustrated all mixed together. My suggestion is for you to go on SafeBoot to see if your screen also ***** up. If so, then we're in the same boat, pal. Call up Apple and inform them so they'll know this is a thing. (they classified my case as a unique and isolated case. If they get similar reports it may help them in identifying and rectifying the problem).