Does not Start..

Possible power cable fault, hard to tell really, especially if you ran the laptop battery flat, but it may be a flat cmos (bios) motherboard battery, also check that the hibernate switch where you close your laptop lid is not stuck down as this will dissable power up.

I have the same problem and believe I have discovered the source of the problem. When I removed the back panel of the laptop, it started up just fine. I discovered that when applying pressure to the back of the board in the area of the hibernate switch, the laptop went into hibernate mode. If I kept pressure on the switch (simulating the back cover in place) I was not able to restart the laptop. However once I released the pressure, the laptop started just fine.

The switch seems to be spring actuated, designed to trigger the hibernate mode when the latch applies pressure against the switch depressing the spring. Apparantly the speing has failed thus resulting in the switch being engaged all the time.

I don't know if Sony makes a replacement switch but that seems to be what would solve the problem. I have learned one thing though, there is more built-in obsolecence in these machines all the time. I don't understand why they can't simply make a long lasting product for the $$$ we spend.

nbanville