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Re: My Acer Aspire 7720Z shuts down spontaneously with no...
Your computer is virus infected scan it with updated antivrius . Also u can scan it in safe mode. When you power up press F8 key then enter in safe mode.
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First thing I'd check is for a BIOS update for your computer under the Acer support pages (acer.com). In some cases, thermal control updates are included in newer version of the BIOS, if it is a manufacturing problem.
Goto http://www.cpuid.com/hwmonitor.php and download Hardware Monitor, start the computer and immediately run the hardware monitor app to check how high the temperature on the CPU gets before it shuts down.
Continuing use under this condition may damage your Windows installation because of the sudden shutdown.
Get a flashlight and shine it on the screen. If you can see the desktop etc, although faintly then either the screen's backlight has failed or the invertor that drives it.
If you can;t see anything at all it's likely the screen has failed completely.
You could try a new cpu fan and heatsink. They are normally inexpensive. if this does not work make sure all the case fans are working and check to see if your ram is overheating
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