USB and iSight not working

Hi, I've been having some issues with my macbook:

 

(1) My front USB port is not working. I've been getting the following message everytime I restart (even when nothing is pluged in): "Becayse a USB devide was drawing too much power from your computer, one or more of your USB devices have been disabled". I've tried resetting the PRAM and SMC, this does not work.

 

(2) My built-in iSight no longer works. I tried using skype and photobooth and the camera is not detected. I looked in my system profilers and isight is listed but I'm not sure what this information tells me (see below):

 

Built-in iSight:

  Product ID:          0x8507

  Vendor ID:          0x05ac  (Apple Inc.)

  Version:           4.42

  Serial Number:          8TA5B04NPDCJ6F00

  Speed:          Up to 480 Mb/sec

  Manufacturer:          Apple Inc.

  Location ID:          0x24600000 / 2

  Current Available (mA):          500

  Current Required (mA):          500

 

(3) My battery drains when my macbook is in sleep mode (this was not happening before).

 

(4) My computer seems to be getting really hot. This cause the bottom rubber of my macbook to start peeling off. I've downloaded iStat to keep and eye on the temperature but I'm not sure if this is related to my other issues.

 

Does anyone have any idea what could be causing this? Are there any tests I can run? I'm not sure if these issues are related or not. Please help.

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