Mid 2012 macbook pro glitching, freezing, overheating

Question

Starting a few weeks ago, I noticed a change in my mid 2012 macbook pro. My laptop was losing charge EXTREMELY quickly, I would charge the laptop to 100%, and just an hour later (after not using it, but the lid closed and it was sleeping) it would be up to 60% charge, then when not in sleep and on, it would lose energy extremely quickly. I always make sure that unecessary background apps are not running--so that was not the problem. This problem went away after a week, but it was the first signal that something was wrong with my laptop.
Next, the laptop was having problems with waking up from sleep, I did an SMC reset and this problem was fixed.
After that, the laptop started glitching (static and banded lines on the bottom of the screen) and making this clicking noise when I was streaming video fullscreen on Netflix. I thought at first, that this was a problem with Silverlight, and reinstalled the silverlight plugin (several times). Then I noticed that the computer would glitch when I was streaming full screen on Netflix and picked up the laptop (moved it from a flat surface). This signaled to me that the problem was perhaps not software, but a hardware issue. I verified the disk and did a permissions report and neither were curative.
Further support that the problems are with hardware rather than hardware came to me when my computer presented itself with a fourth issue: the laptop, when being lifted or moved from a static surface, would sometimes freeze entirely and make the same clicking noise. This problem was not during fullscreen streaming, but had spread to when I was simply using more than one app at the same time (e.g. having Chrome and Word open together). When this happenend, the only solution would be to power down the computer and restart.
Finally, while sleeping with the lid closed in my backpack, I hear a whirring noise--I pick up the laptop and it was hot to the touch, overheating with the fans running on high speed.
I have no clue what is going on. I have taken the computer to my university's mac shop and they have suggested it is a logic board issue and I should give the computer in. I have scoured the forum for an answer of what is happening and am determined to find one. So I pose the problem to you--any help would be appreciated. Thank you.

Answer 1

Hardware Information:
          MacBook Pro (13-inch, Mid 2012)
          MacBook Pro - model: MacBookPro9,2
          1 2.5 GHz Intel Core i5 CPU: 2 cores
          4 GB RAM
Video Information:
          Intel HD Graphics 4000 - VRAM: 1024 MB
System Software:
          OS X 10.9.2 (13C64) - Uptime: 0 days 1:2:24
Disk Information:
          APPLE HDD HTS547550A9E384 disk0 : (500.11 GB)
                    EFI (disk0s1) <not mounted>: 209.7 MB
                    Macintosh HD (disk0s2) / [Startup]: 499.25 GB (278.23 GB free)
                    Recovery HD (disk0s3) <not mounted>: 650 MB
          MATSHITADVD-R   UJ-8A8 
USB Information:
          Dell USB Portable HDD 1 TB
                    Dell USB Portable HDD (disk1s1) /Volumes/Dell USB Portable HDD: 1 TB (947.04 GB free)
          Apple Inc. FaceTime HD Camera (Built-in)
          Apple Inc. BRCM20702 Hub
                    Apple Inc. Bluetooth USB Host Controller
          Apple Inc. Apple Internal Keyboard / Trackpad
          Apple Computer, Inc. IR Receiver
FireWire Information:
Thunderbolt Information:
          Apple Inc. thunderbolt_bus
Launch Daemons:
          [System] com.adobe.fpsaud.plist 3rd-Party support link
          [System] com.cloudpath.maccmd.plist 3rd-Party support link
          [System] com.microsoft.office.licensing.helper.plist 3rd-Party support link
          [System] com.oracle.java.Helper-Tool.plist 3rd-Party support link
          [System] com.tunabellysoftware.TGFanHelper.plist 3rd-Party support link
Launch Agents:
          [System] com.oracle.java.Java-Updater.plist 3rd-Party support link
User Launch Agents:
          [not loaded] com.apple.CSConfigDotMacCert-[...]@me.com-SharedServices.Agent.plist
          [not loaded] com.facebook.videochat.[redacted].plist 3rd-Party support link
          [not loaded] com.google.keystone.agent.plist 3rd-Party support link
          [not loaded] com.spotify.webhelper.plist 3rd-Party support link
User Login Items:
          None
Internet Plug-ins:
          FlashPlayer-10.6: Version: 12.0.0.77 - SDK 10.6 3rd-Party support link
          QuickTime Plugin: Version: 7.7.3
          Flash Player: Version: 12.0.0.77 - SDK 10.6 3rd-Party support link
          Default Browser: Version: 537 - SDK 10.9
          SharePointBrowserPlugin: Version: 14.1.0 3rd-Party support link
          Silverlight: Version: 5.1.20913.0 - SDK 10.6 3rd-Party support link
          JavaAppletPlugin: Version: Java 7 Update 40 Outdated! Update
Audio Plug-ins:
          BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
          AirPlay: Version: 2.0 - SDK 10.9
          AppleAVBAudio: Version: 203.2 - SDK 10.9
          iSightAudio: Version: 7.7.3 - SDK 10.9
iTunes Plug-ins:
          Quartz Composer Visualizer: Version: 1.4 - SDK 10.9
User Internet Plug-ins:
          RealPlayer Plugin: Version: (null) 3rd-Party support link
3rd Party Preference Panes:
          Flash Player  3rd-Party support link
          Java  3rd-Party support link
Old Applications:
          /Library/Application Support/Microsoft/MERP2.0
                    Microsoft Error Reporting:          Version: 2.2.9 - SDK 10.4 3rd-Party support link
                    Microsoft Ship Asserts:          Version: 1.1.4 - SDK 10.4 3rd-Party support link
          Microsoft AutoUpdate:          Version: 2.3.6 - SDK 10.4 3rd-Party support link
                    /Library/Application Support/Microsoft/MAU2.0/Microsoft AutoUpdate.app
          /Users/[redacted]/Downloads
                    Install Spotify:          Version: 1.0 - SDK 10.5 3rd-Party support link
                    Install Spotify 2:          Version: 1.0 - SDK 10.5 3rd-Party support link
          SLLauncher:          Version: 1.0 - SDK 10.5 3rd-Party support link
                    /Library/Application Support/Microsoft/Silverlight/OutOfBrowser/SLLauncher.app
Time Machine:
          Time Machine not configured!
Top Processes by CPU:
               3%          WindowServer
               2%          hidd
               2%          EtreCheck
               0%          Google Chrome
               0%          notifyd
Top Processes by Memory:
          152 MB          Google Chrome
          123 MB          com.apple.IconServicesAgent
          106 MB          mds_stores
          86 MB          loginwindow
          61 MB          Finder
Virtual Memory Information:
          908 MB          Free RAM
          1.64 GB          Active RAM
          881 MB          Inactive RAM
          626 MB          Wired RAM
          900 MB          Page-ins
          0 B          Page-outs