I have a Sony Vaio VGN-NW21ZF laptop. A few months ago it started having difficulty booting up. It would usually just display a blank screen with a blinking cursor. This problem was intermittent.
I discovered that if I removed the hard drive and then re-inserted it, this would usually fix the problem. My laptop would then boot.
However the problem happenned more and more frequently and eventually the hard drive removal and reinsertion trick no longer worked. I was no longer even presented with the blinking cursor. I put this down to a hard drive failure and bought a new laptop (I use one for work and so needed a quick fix).
Recently I decided to get my Vaio back up and running. I bought a SSD, installed it, loaded Windows 7, and everything seemed to work fine. However, I am now running into the same issue again. After installing some Windows updates I was asked to restart my computer, however I just ended up back at the blinking cursor screen. I have tried removing and reinserting the hard drive, and it has worked a couple of times, but this time when trying to power up I am just getting a blank screen. The light at the front of the computer (which usually does a bit of flashing ...which I understand indicates that the hard drive is doing stuff) does not light up.
I can only assume that my new hard drive is fine, and so I guess my laptop is having trouble communicating with during the booting process. If anyone can educate me as to what is going on and suggest a solution I would be very grateful.