I'm not sure whether this is a subject for the Mageia Forum, but it is Mga that I'm trying to load. This is the situation.
I have a newish PC, a Lenovo ThinkCentre m75-s, that I've previously used to test out alternative OS'es. Not being a Windows fan, I deleted the installed Windows and devoted the whole drive to Linux systems. I've recently decided to establish this as an Mga sytem as a backup to my main desktop machine. Currently it's running Mga7. The machine has always been a bit iffy as to booting uo from DVD, sometimeds going straight onto the HDD, even when a DVD is fitted into the internal DVD drive. Now, the situation seems to be permanent. The machine will not boot from DVD at all but , Whilst the DVD is working, the activity light is flashing, the machine goes on to the Mga intro screen. The bios is setup with (now) both ithe internal DVD drive, AND a USB DVD drive with no visible change.
Please do noot suggest I use the update option which the machine is urging me to use, since, in this case, I wish to re-visit Mga 5 and 6, before moving upwards.
As I said, I'm not sure whether this is a subject for this forum. The general impression is that the bios is not dwelling on alternative boot options long enough for the specific drive to begin to operate, so the bios sweeps on to the HDD option. Which being an SSD is pretty brisk.