[s99raj]

I have a Compaq Presario 700 laptop which simply won't switch on, either by the mains or by battery; it's completely dead both ways.

Is the mainboard inside the laptop burnt out?

Could it be the charger board (I don't know exactly what that is - 've just heard of it!)?

[thebriggsdude]

Have you tried the old wiggle the connections thing. May be the board is fried but does anything come on. Power light etc

[ScottGem]

Try wiggling the connections. Try removing the battery and seeing if it boots on the charger. If neither work, then it time to take it to a tech.

[cremedies]

If you are somewhat of a techie and confident, you could open up the laptop and remove and reseat the CPU. I have seen this simple operation cause a laptop to start again when it was dead in the water.