These laptops use a CCFL LCD, which is difficult to find a replacement for today. When you do find them, it's usually a overpriced NOS panel.
If you don't want to give up on this laptop, your best bet is to find a parts laptop with a good LCD that doesn't look heavily worn. If you just buy the screen or screen assembly, it will cost more then a whole new laptop. However, my recommendation is to find a newer model that comes with an XP COA and hopefully has a LED display. XP laptops are usually cheap these days because when XP went EOL, the market was flooded with XP systems. This has essentially made it hard to economically repair XP era laptops that failed without coming close (or exceeding) to the cost of a complete replacement.
The model that I like to replace these machines is the E6410. There's plenty available with an XP license to go around and these can be purchased for relatively cheap. These also use LED screens, so you don't have to worry about LCD replacement cost problems. If you can't find an example with a XP license, you can use the COA from your old laptop and take advantage of downgrade rights, as long as it's an XP Pro license. The catch is you have to get a machine with a 7 Pro license to do this. Home Premium does NOT include downgrade rights.