|This is the only V2019 I could find on compaq's site:|
Is that it? There's an alert there about a battery pack recall. Maybe the problem you're having isn't a bios issue.
But anyway, you can click on the 'software and driver downloads', choose XP as your OS and it'll show you the available downloads. It only shows one bios download but if you open that bios section you'll see a link that says 'previous versions available'. Click on that and it'll show 10 older versions.