Mbp 2011 screen freezes and beeps

Question

My 2011 MBP 13.3 will freeze, displaying short bars across the screen in columns, audio beeps three times in intervals.  I must hold the power button down to reboot.

Answer 1

Some things you can try:
1. Try a new user account, create one in System Preferences -> Users and Groups, test to see if the issue still persists in this new user account, this will give us a lot of information. (if the problem is the same or it vanishes, let us know)
2. Make sure all your software is up-to-date, Apple Logo -> Software update.
3. Unplug all 3rd party devices, just keep in the necessary, Power, Keyboard + Mouse, no ethernet or external hard drives etc.
4. Reset the PRAM http://support.apple.com/kb/PH4405
5. Reset the SMC http://support.apple.com/kb/HT3964
6. Boot to the recovery partition (CMD + R on startup until you see a spinning cog with an apple logo, then let go) -> Choose english as the main language -> Choose Disk Utility -> Select your hard drive from the left pane of Disk Utility (NOT Macintosh HD, the one that will look similar to: 1TB ST3200WAJS) -> Select the 'First Aid' tab -> Bottom right of the window it will say 'S.M.A.R.T Status: ________' ... What does it say after smart status?
7. While still inside the Recovery Partition, select Macintosh HD -> First Aid (tab) -> Verify Disk -> Repair Disk (unless it says the volume Macintosh HD appears to be OK) -> Verify Disk Permissions -> Repair Disk Permissions (if there are differing permissions on the disk)
Let us know if the issue still persists, but make sure you do all of those steps correctly and post back as much information as possible (PRAM takes two chimes at startup, unplug the power cable for 15 seconds, plug it back in, wait 5 seconds, turn on... make sure you follow all articles)
Good Luck!
MiiCK