Hi,
Since the Sony Vaio VGN-CR220E works except that the display is dark, then it
would be safe to assume that it is only the LCD display part that is
the issue. Often LCD display (of laptops) are working but only that you
can not see the actual display. One way to verify is to shine a flashlight
at an
oblique angle to the screen, semblance or part of the desktop could be
seen s what you have done. If the
desktop could be seen (albeit very very dark background) then it could
either be the CCF Lamps (cold cathode florescent) or the inverter that
powers the lamps.
Often, the defective component would be the inverter. It is
relatively easy to replace the inverted. It is sometimes more difficult
and challenging cracking open the casing of the display panel of the laptop than replacing
the inverter. Additionally, inverters are readily available online. It
is also not surprising that inverters for other brands/models would
also be used in your Sony Vaio VGN-CR220E .
Of course another possibility is that there is just a loose connection or a cold solder in the LCD panel display's circuit boards.
This would be a good place to start for inverter boards.
This is a nice tutorial if you are considering a DIY.
Hope
this be of initial help/idea. Pls post back
how things turned up or should you need additional information.
Good luck and kind regards.
Thank you for using FixYa.