My first response to that kind of problem, is to disconect the computer from the mains, not just switch it off, but unplug it, and pull the RAM.

Give it about 20 mins, and then reset the bios.

Dis. all of your hard drives, but leave your CD/DVD.

If you have DOS on a CD, insert it, failing that, your windows CD

If possible, insert an old but working HDD

Insert a known good RAM, plug in and turn.

If this works, turn off, and restore the original HDD, and try again.

Still Working? Replace *one* RAM chip, and try again.

However, if, having eliminated all the relevant components, you are still having trouble, then I can only gues that you have damaged one of the solder connections on one of the memory slots.

This is fixable, but requires some considerable soldering skill, and some understanding of the damage that an unshielded, or indiscriminatly applied electric soldering iron, can do to delicate electronics.

If you are going to go down that road, I would suggest a very small gas soldering iron, something like a BernzOmatic, a good magnifying glass or loupe, self fluxed solder, no heavier than about 22 SWG, and a very delicate touch.

If none of that helps, and no one elses contributions solve your problem, then I advise following your first instinct, and take it down the garden, and kick seven sorts out of it.

It won't make it work, but it will give some small vent to your frustrations.