I have a sony vaio laptop, couple years old but not super old. Yesterday I couldn't get the computer to even register the ac adapter, no power lights, battery lights etc. Played around with it a bit today (needed to know whether it was the DC inlet that was the problem, tested it and was getting 19.9 volts out of it so it's working) finally the computer attempted to boot up, power light came on and battery light flashed, fan turned on, cd attempted to boot up to then nothing..nothing at all registered on the screen. Tried it again and suddenly the power light, and both battery lights are on but it's not doing anything, not even booting up and I can't hold the power key to turn it off. So now I have no idea what to do. The only way to shut the computer fully off is to remove the battery but I would like it to atleast attempt to turn on. The lady at the computer store didn't give me much except it could be a motherboard, hard-drive, faulty connector...Does anyone have any ideas that I can atleast test out before I spend money to get this thing looked at?