Resolved [Macbook Pro]: Not booting properly, Crashes, Freezes, CPU problem?

first time posting on macrumors.
have technical issue i'd with:

tl;dr: computer freezes when more few basic tasks, , won't boot before several reboots. panic report seems indicate might cpu problem.

system info:
macbook pro, 15" ultimo 2011 (late 2011)
software: mac os x lion 10.7.5
--
processor: 2.2ghz core i7 (2675qm)
memory: 8 gb 1333 mhz ddr3 (upgraded 4 gb)
video cards:
-radeon hd 6750m - 512 mb gddr5 sdram
-intel hd graphics 3000 - 384 mb ddr3 sdram
hard drive: 500 gb (5400 rpm), serial ata (6 gb/s)
--
machine bought new in 2011.
-this makes me quite warranty has expired now.

problem:
problem started approximately 1 week ago , has been there consistently ever since:

1: not boot properly: when start machine, hear startup chime, see apple logo, , machine loads does. however, when apple logo disappears, screen becomes white , stays way until manually turn off holding down power button. turns off after 5 minutes.
-sometimes system boots properly, , i'm able use computer (which how i'm writing post in first place).

2: after time, machine spontaneously freezes, , have turn off manually, because i'm unable interact it. often, shows either row of blue , black vertical lines across screen, or black , white ones. screen freezes without optical glitches.
-i've noticed tendency of freezing highest when opening , using decently heavy programs or using computer more few basic tasks. (examples: browsing google chrome, playing music spotify, etc.)

3 of many times these problems have occurred during last week, machine asked me manually restart computer. afterwards opened panic/problem report, of 1 of them can found here via pastebin link:
http://pastebin.com/ph1cz5wh
-the report seems indicate might cpu problem, far can tell.

what i've tried:
followed of support articles on support.apple.com , tried these solutions:

booting in safe mode. (shift key @ start-up).
-this did not solve issue.

running aht @ start.up (apple hardware test) (d key @ start-up)
-i ran basic test, stated no trouble found

booting in single-user mode , verbose mode (cmd + s , cmd + v respectively)
-none of these solved issue
-i did not change files in single-user mode.

booted in recovery mode (cmd + r) , reinstalled lion. did not either.

potential causes:
-during summer had computer lying on bed. sled off onto floor, suppose might have caused internal damage. however, happened quite few weeks before issue began, far can recall.
-i read online fans might have collected dust on time, can make cpu shut down prevent damage overheating.
-i recall reading gel inside computer there wrong with.


@ appreciated.

 

you might have problem radeon hd 6750m video card, known problem. see macbook pro repair extension program video issues.
may need make appointment have tested @ apple store.

 

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