In your case, if you're not getting a beep or anything after pushing the power button to start up, you'll need to start troubleshooting the internal parts of the computer. If you're not experienced with that sort of thing, then a reputable tech might be your best solution. If you want to give it a try, then I'd start with the power supply..Replace it, then move on to other parts such as the motherboard, etc..
Hope this helps.
I'm trying to fix a PCG-k13 sony vio, about a year and a half old. So it doesn't do anything. Doesnt boot, nothing shows up on screen. Nothing. I tried the troubleshooting on the sony support website, it said take the battery out, use AC. Make sure the ram is working, blah blah blah. I did that, I even tried to turn it on with out ram in it, it didnt beep, didnt do anything. So I donno what the problem is, i'm thinking something is just done for inside. I also tried attaching another monitor, that didnt do anything either. And I think the warrenty runs out after year, so any suggestions? I'm thinking sending them to best buy , they will probably send it to sony. any help would be appreciated