There are lots of reasons why it can shutdown, but happerlly none should be serious. It may be that the B+ or Power supply is too high, look for a pot near the power supply and try turning it down a bit. Also the x-ray protection may be too high, look for the X-Ray pot, found near the FBT, turn that down too. I assume your a tech and know how and where to be carefull.
It sounds like your
video card settings are too high and your monitor cannot handle the settings. One way to confirm this is to boot into SAFE MODE and see if it still happpens. If it does not, then its the video card settings. If it does, then it indicates that the monitor is in need of service or replacement.Turn down the resolution and color depth settings all the way, and then increase them incrementally until it is as high as it can go until this problem starts happening again. To adjust video settings, right click anywhere on the desktop and select Properties. Then go to the settings page.If the display does not stay active long enough to make these changes, then boot into SAFE MODE and delete the video adapter from the device manager. Upon rebooting the computer, the video adapter will re-install itself with low default settings.Is the correct monitor selected in your display settings?Make sure that the correct monitor appears in Display properties. If the wrong monitor is selected, Windows might not use the full capabilities of your monitor, and you might be restricted in your choice of screen resolutions.
To check your monitor selectionOpen
Display Properties in Control Panel. Click the
Settings tab, click
Advanced, and then click the
Monitor tab. The monitor that is selected for your computer is displayed under
Monitor Type.If correct monitor isn't listed, click
Properties. Click the
Driver tab, and then click
Update driver. After the Hardware Update Wizard starts, click
Install from a list or specific location, and then click
Next. Click
Don't search. I will choose the driver to install, and then click
Next. This provides a list of monitor manufacturers and models.In
Manufacturers, click the manufacturer of your monitor, and then in
Models, click the model name.
If your monitor isn't listed, click
(Standard monitor type) in
Manufacturers, and then choose the most compatible setting for your monitor in
Models. Click
Next, and then click
Next again. NoteTo open
Display Properties, click
Start, click
Control Panel, click
Appearance and Themes, and then click
Display.Are you using the wrong driver for your display adapter? ImportantThe following procedure might require you to restart your computer, which will close this troubleshooter. If possible, view this troubleshooter on another computer while you perform the steps on the computer you are troubleshooting.To continue troubleshooting if no other computer is availableRight-click the page displayed on your screen, and then click
Print.
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Follow the steps in the printed copy of the procedure.
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After your computer restarts, reopen this troubleshooter and answer each question as you answered it initially.When you reach this page again, answer the question at the bottom, and then click Next.If the wrong driver is specified for your display adapter (video card), you might have problems installing your monitor or increasing the video resolution above 640 × 480 with 16 colors.To find out whether a better driver is availableOpen Display Properties in Control Panel. Click the Settings tab, click Advanced, and then click the Adapter tab. Click Properties, click the Driver tab, and then click Update Driver.Click Install the software automatically (Recommended). Follow the instructions in the Hardware Update Wizard to search for a better display adapter driver. Restart your computer if you are prompted to do so. NoteTo open Display Properties, click Start, click Control Panel, click Appearance and Themes, and then click Display.You might be able to download an updated driver from Windows Update. To go to the Window Update Web site, click Start, point to All Programs, and then click Windows Update. If an updated driver is available, follow the instructions for downloading the software to your computer and installing it. If the driver is not installed automatically, use the procedure above to locate and install the driver on your computer.
Does installing the correct driver for your display adapter solve the problem?Does Windows support your display adapter?
To determine whether your display adapter (video card) is supportedCheck the Windows Hardware Compatibility List (HCL) in Help & Support.If your display adapter is supported, the HCL might include notes about it or links to updated drivers. Download any new drivers that are available. NotesIf you follow this link, when you return to this troubleshooter you will have to start over from the beginning and answer each question as you answered it initially. You must be connected to the Internet to view the HCL. If you do not have Web access, contact the manufacturer of your display adapter to find out if it is compatible with Windows XP. If your display adapter is not on the HCL, or is listed but is not shown as being compatible with Windows XP, Microsoft does not provide support or drivers for it. Contact the adapter manufacturer, or visit the manufacturer's Web site, to obtain a driver that is compatible with Windows XP.
Does Windows support your display adapter?If it is supportedDecrease the hardware acceleration setting. ImportantThe following procedure might require you to restart your computer, which will close this troubleshooter. If possible, view this troubleshooter on another computer while you perform the steps on the computer you are troubleshooting.
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To continue troubleshooting if no other computer is available
-
Right-click the page displayed on your screen, and then click Print.
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Follow the steps in the printed copy of the procedure.
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After your computer restarts, reopen this troubleshooter and answer each question as you answered it initially.When you reach this page again, answer the question at the bottom, and then click Next.To decrease hardware accelerationOpen Display Properties in Control Panel. Click the Settings tab, click Advanced, and then click the Troubleshooting tab. Drag the Hardware acceleration slider to the left.
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Click OK, and then click OK again.
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Restart the computer when you are prompted to do so.
Note
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To open Display Properties, click Start, click Control Panel, click Appearance and Themes, and then click Display.
Does decreasing hardware acceleration solve the problem?
If not resolveIs the BIOS for your display adapter out of date?
The BIOS for your display adapter might not allow a resolution higher than 640 × 480 with 16 colors.
Contact the display adapter manufacturer to find out whether there is an updated video BIOS for your display adapter that supports higher resolution.Does upgrading the video BIOS solve the problem?