I have had USB thumb drives that just wouldn't boot on some computers. Try a different USB drive maybe.
Linux
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Rules
- Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.
- No misinformation
- No NSFW content
- No hate speech, bigotry, etc
Related Communities
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
In your BIOS, ensure that you have compatibility mode enabled for USB devices. Sometimes it's called legacy mode. If not, your PC could refuse to boot from some devices. Sounds like what's happening here at least. Usually if this mode is disabled the USB device won't show, but its worth a shot.
Could you install Linux on a drive om other pc and then move it to this one?
It could be that you're trying to boot images that only do uefi boot? Or is the machine old enough to not support 64-bit stuff? I resurrected my first Thinkpad (2003) with a Debian 32-bit install, that'll surely boot on yours as well!
What are you using to create the boot media? Try Rufus, and make sure it's BIOS and MBR.
Try USB 2 ports using a USB 2 drive, and try different ports. Ive seen issues where I had a perfectly good drive and it wouldnt boot at all. Using a different port it installed fine. Similar issues using USB 3 drive or ports in machines only a few years old.