@ bearerofthetorch (aka newlight of AmigaWorld - newlight's X5000 thread) from Spain) - The CD media is usually the simplest way of booting MorphOS when you have an issue, as long as you are sure the CD/DVD device is working correctly.

What system/software did you use to 'master' the CDRW you put the MorphOS boot data onto?

Also what make/brand name is the CDRW you have used? As some CD-R/W media that I've used have not been reliable.

If you can get it to boot, as it seems you have managed to a few times, then you may be able to check the installation for integrity by running SFSDoctor, which you should find in the System:Tools/ drawer by choosing the 'Check disk' option.

Ideally you don't want to repair the system by this process, as you need to have the System unlocked/not allocated as the System (SYS) at the time (which is usually DH1 - though it may be labelled differently as you have OS4.x, etc., on your X5000 HDD as well).

This MorphOS installation issue/likelihood was pointed out on 8-June-2022 by one of the MorphOS Developers (jacadcaps) who also wrote Iris and Wayfarer (your favourite MorphOS software it seems), who suggested you repair the system's installation validity/integrity with SFSDoctor.

However, you need to do so via the booting/installation media, but you can check the installation for errors while the system is running, if the MorphOS installation you have on your HDD will allow you to boot from it - if it will play nicely for you, just one more time.