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We have a Sony VAIO, VGC-LV290J. When plugged into an outlet, the machine's fan just revs. The "VAIO" splash screen does not appear and the screen remains blank. The Bluetooth keyboard does appear to be paired, however, pressing any "F" key seems to not have an effect -- or perhaps we're too slow? I should also note, if I turn the machine I'm convinced it's the CMOS battery. However, cannot find the battery.

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It seems that the 'POST' (Power On Self Test) is not starting, and thus is not displaying the "splash" screen. The fans will run at 100% until the POST completes.
But, if the POST does not complete, the fans will "roar".

Check for a defective CPU, or defective RAM, or a defective motherboard.

It probably is *NOT* the CMOS battery -- if that battery is dead, then the "default" settings should allow the computer to start (with the wrong date/time).

Posted on Mar 15, 2011

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