Trisquel won't install on Lenovo ThinkCentre

Hello everyone,

I'm trying to install Trisquel 7 (using 1,5 GB ISO DVD) on Lenovo ThinkCentre E73, but the setup just doesn't start form the DVD disc; the computer just restarts.
Mini and NetInstall versions also doesn't work on this computer.
I've already tried using both DVD (standard Trisquel) and CD (Mini) discs and a bootable pendrive.
For example, Ubuntu from a DVD disc and other GRUB-based OS'es started from pendrive work correctly.
I've checked the discs and pendrive with other computer and they are created properly and other computer can boot from them.
I've also set many BIOS settings including Legacy boot mode, disabled Secure Boot etc.
This computer is 1,5 years old, but for example Trisquel will start properly on a newer Lenovo ThinkPad laptop.
Is it that Trisquel doesn't support this computer?
I'm trying to switch from Windows, so any help will be appreciated.

Best regards,

Marek