Sony PCV-RX851 - Manual (Page 72)

About VAIO Computer Functions
My computer does not start.
 Check that the computer is plugged into a power source and that it is turned on. Check that the power light is lit on
the front panel of the computer.
 Confirm that a disk is not in the floppy disk drive (unless you are using a bootable floppy disk).
 Confirm that a CD is not in an optical drive (unless you are using a bootable CD).
 Confirm that the power cord and all cables are connected firmly.
 If you plugged the computer into a power strip or Uninterruptible Power Supply (UPS), make sure the power strip or
UPS is turned on and working.
 Check that the monitor is plugged into a power source and turned on. Check that the brightness and contrast
controls are adjusted correctly. See the manual that came with your display for details.
 Check that the computer is not in stand by mode.
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