I did a system restore on my sony vio vgc lt20 and now no screen

SOURCE: restore my dell dimension 5150

disable all integrated devices, change boot sequence to cd drive & then try to reinstall....

SOURCE: Blank screen when computer is turned on

When you get the Dell splash screen press the F2 key to get into setup. Use the arrow keys to go down to Drive Configuration and press enter. Go down to Primary Master Drive and press enter. Is the Hard Drive listed there? If not, that is your problem. Press Escape then use arrows to go down to Memory Information and press Enter. Is all of your Memory listed? If not, that could be the problem. Press "esc" to get out of setup. If the Computer does not freeze while in setup I would suspect the Hard Drive is bad. Is the Pointer responding to Mouse movement or does it lock up? In your situation I would first try to Boot from the Windows CD. Write back and I can explain how to do this. If that does not work I would begin to test Hardware. Do you hear any Beeps when the unit is turned on? If you can, E-mail back with more Info.

SOURCE: restore acer to factory default

If you do not have a disk which comes with some computers, here is what you can do→
This is called a "system recovery"
My windows XP, was already loaded on my computer, when I bought it. These instructions, will clean everything off of your hard drive, so you must back up anything that you want to save. I have done this three times, and I got these instructions, from a computer tech. When starting your computer, tap the F-10 key. click on next-yes-and follow the instructions, that come up on your screen. When you are finished, your computer, will look just like it did, when you first bought it. Do these steps, in order, when finished.
1. set up windows firewall
2. windows update (click express)
3. install your anti-virus program (update)
4. install anti-spyware (update)
5. Install service pack 2..3..Good Luck..
All your drivers etc. will reload on your computer, without a disk. All this information is stored on a hidden partition on your hard drive.. Good Luck

SOURCE: Wireless mouse locks up

I would suggest investing in a USB mouse. They never have this problem and are very cheap to buy. I have found that wireless mice are prone to problems. I would say there is a problem in the connection between your mouse and the laptop but this sort of problem is quite hard to find. As I said, you are better off with USB mouse.

SOURCE: Loss of Wireless Keyboard/Mouse Connectivity Sony Vaio VGC-LV1S

check batteries