Notebook screens are nonstandard, so you need a screen from the same notebook model
. Unaffordable and unavailable from the manufacturer, but look at eBay.de or eBay.com
- either for a complete notebook, possibly sold as defective or "for pieces" or, with some luck, you'll find just a screen. Not necessarily cheaper than the complete notebook.
I wrote .de or .com because other eBay are smaller or less tech-oriented.
Don't forget to compare the price of a used Latitude with other used models.
I didn't look for a long time, they probably tell there if you can exceed 256MB. Upgrading from 750MHz to 850MHz would bring little.
To improve an old computer, you may expand its hardware (especially the Hdd), but you may revert to older software as well. If your computer doesn't connect to the Web you can drop all security software and revert to Win Me and Office 97 Pro and so on, and then a 750MHz 256MB is fabulously fast, quick and swift. About 5$ and 40$ at eBay. W2k would also fit better in 256MB than Xp (or less badly, depending of additional software).
Replacing the Hdd with one (...or two...) CF cards also improves a laptop a lot, but choosing the right CF cards is not easy. And P-Ata Ssd are supposedly all bad.
Mamma mia, this is a 440bx chipset
Excellent speed BUT the worst ever for Ram compatibility.
According to Intel, it can handle 256MB as a maximum total (2*128MB) though people succeeded using 512MB on it.
But on a laptop, I wouldn't try. Too expensive, too random.
Would be fantastic with WinMe, acceptable with a good Hdd and W2k if some security is needed.