Pink and pixely

i have an issue all of the sudden. parts of my screen are pink and pixelated by default colors. when i turn my brightness down to almost zero percent (weather it be in nvida control or windows color calibrator) the screen colors go back to normal and look as good as the always have and no pixelation appears( except in games that bypass nvida control panel settings). however when i bring the brightness to about 7% the screen starts going to a green tint and at about 50% brightness lots of pink pixelly colors start emerging. i have never messed with the colors before they were always perfect by default. a side note i have properly uninstalled and reinstalled all drivers a few times now, including a clean sweep with driver sweeper, and have even rolled them back properly. it cant be my monitor as its an lcd tv and the tv input picture looks perfect. please any help would be amazing, let me know if a picture would help, i hope this card is not taking a dive. here is my dxdiag

System Information
Time of this report: 12/7/2012, 00:08:20
Machine name: CHINCO
Operating System: Windows 7 Ultimate 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.120503-2030)
Language: English (Regional Setting: English)
System Manufacturer: INTEL_
System Model: DX58SO2_
BIOS: Default System BIOS
Processor: Intel(R) Core(TM) i7 CPU 960 @ 3.20GHz (8 CPUs), ~3.2GHz
Memory: 6144MB RAM
Available OS Memory: 6132MB RAM
Page File: 1921MB used, 10341MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode

Display Devices
Card name: NVIDIA GeForce GTS 250
Manufacturer: NVIDIA
Chip type: GeForce GTS 250

Display Memory: 3811 MB
Dedicated Memory: 1001 MB
Shared Memory: 2810 MB
Current Mode: 1216 x 684 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: ZORAN HDMI TV
Monitor Id: ZRN0294
Native Mode: 1920 x 1080(i) (60.053Hz)
Output Type: DVI
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