Wim,
After all of this happening, I would probably cut my losses and get a new computer, you can pick another one up like you have for about $300 bucks, at a minimum you still have at least $50 bucks to put into this one.
As an aside, if you want, you could send me this one, I have boxes of parts around here, I might be able to fix it for you, I am pretty good at tearing these laptops apart and getting them working again, I do a lot of them and normally give them to a needy kid so they have computers for school, but if you wanted and I can get it fixed, I could just send it back to you, but like I said, I have boxes of parts around here, so I might have some stuff to repair yours pretty cheap.