When turning the laptop on, it's not booting up. The screen is black and the green light stays solid, though I can hear the fan.

1. When you press the power button to turn it on, do you see any thing on screen, like the toshiba boot up screen or something like that. Or is it completely blank (black color) always.

2. Can you see a faint image of your desktop (try to see it in dark place with flash light). This is important to confirm.

3. Also, when you press power button, do you see the LED lights on laptop blinking or solid green (which ones are in blinking/solid) and do hear any sound ? Or do you feel that your laptop doesnt even try to boot.

4. Can you hear any Beeps when you try to turn on the computer. If yes, what is the sequence of those beeps.

Continued......
If you answers are -
1. blank
2. no image
3. only the satellite light is blue, the powercord is blue and the battery is blue
4. no noise

Please do the following carefully and let me know result :
1. Shutdown and Unplug your laptop.
2. Remove the battery from the laptop.
3. Wait 2-3 minutes
4. Now press ON (power button on laptop) for 1 minute
5. Then release the finger and wait one more minute.
6. Now plug in the power cable (dont insert battery yet) and press ON button.
7. Did your screen start working now ? (do you see windows loading)

try to turn it on with the battery out, as it could be a faulty battery, if you still get nothing take it back to the store as it has a fault.

It sounds that the main digital board to this TV is faulty. Contact any service technician.

If your laptop appears to boot up and the hard disk LED flashes, then the problem is probably a back light fault. This can be a faulty inverter or a faulty CCFL lamp. Please click on this link and follow my instructions to identify the fault and possible fix :- http://www.fixya.com/support/r3598095-faulty_laptop_lcd_screen

put your vista recovery disc in it and restart it

If it has no sounds of say music that you would hear of its system launching then its possible its Back up battery has failed an scrambled the Bios, this is a disc like lithium battery in a holder
How to Install CMOS Battery in Gateway Laptop Gateway Netbook disassembly LT2802U

These may help you though I have not seen where its located but that second link might give a clue if you watch it through.

Hope this helps..........

Monitor is connected (power and signal), turned on?

The power button may not work, that is most common in laptops, or you have a short.

does it make the boot up sound? if so its a fault with your screen..can replace screens for £7.50 off ebay. try re- inserting ribbon cable for screen b4 buying new screen tho (could be that). if you can't hear bootup sound when powering up then something else wrong. maybe F1 or F2 fuse blown (test with a multi meter) look on youtube for tutorial

First before a reset the set must turn on, if the set just sits there with the red LED on you have further problems, so does the set display anything?