Mid-2008 MBP, wi-fi completely disables after a few minutes

Starting about a week ago, my Airport began turning itself off after my computer has been running for about 10 minutes. Up until that point, it works well. After that point, there is no way I've found to re-enable the wifi card, I have to restart the computer ("Turn Airport On" does absolutely nothing).
Macbook Pro, mid-2008, 17".
This problem happens in both Windows 7 and OSX 10.6.4
If you have any ideas or need any other information, let me know. I know this is not a problem with my router, as all of my other computers with wifi stay connected with no problems.

Run a hardware test and see if it comes up with anything

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Joining the party...
I am having the EXACT same issue, PLUS my Wacon PTZ-430 only works for a fewminutes then, when the Open GL craps out, so does it... but only certain aspects. The cursor still moves, it just will not paint. Mouse will (direct via USB) but the tablet won't. If I delete CS4 prefs, then the Wacom works fine... for a while. Latest Wacom drivers and bee on the phone w them. All is fine under CS3.
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System Information
Time of this report: 12/8/2008, 15:37:52
Machine name: VM-EDITING
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.080814-1236)
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System Manufacturer: VELOCI
System Model: 122-CK-NF68
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NVIDIA GeForce 8600 GT
Manufacturer: NVIDIA
Chip type: GeForce 8600 GT
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_0402&SUBSYS_043910DE&REV_A1
Display Memory: 256.0 MB
Current Mode: 1920 x 1200 (32 bit) (60Hz)
Monitor: Plug and Play Monitor
Monitor Max Res: 1600,1200
Driver Name: nv4_disp.dll
Driver Version: 6.14.0011.7824 (English)
DDI Version: 9 (or higher)
Second:
Card name: NVIDIA GeForce 8600 GT
Manufacturer: NVIDIA
Chip type: GeForce 8600 GT
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Device Key: Enum\PCI\VEN_10DE&DEV_0402&SUBSYS_043910DE&REV_A1
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Monitor: Plug and Play Monitor
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Michael Lafferty wrote:
The symptoms you describe with and ALS model are indicative of a power supply failure, and not an issue with electrolytic capacitors on the logic board.
I was speaking about the components in the power supply, although the Logic Board components are also in visually good condition.
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Message was edited by: Epochmaker due to omissions in the text.

Mid-2008 MBP, wi-fi completely disables after a few minutes

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