I have had problems writing an iso image to disk with brasero so I usually use xfburn instead...I am assuming you are downloading Plop Linux. HERE is the small CD sized image and the md5sum is 3a3b559d27d0eaef8b323508334d8f9fOnce the iso has downloaded, you should check the md5sum to ensure the download did not get corrupted in transit... that happens sometimes! Open a terminal and issue the following command.
make certain the md5sum matches the number I have supplied. The Plop Linux website has md5sums on all of their image downloads here for reference.Insert a blank CD into the optical driveOpen XFBurn and choose: Burn image The dialog allows you to select the iso image you wish to burn to disk.
That should not be happening... when you write the ISO image are you using the SLOWEST possible burn speed? In a mass produced world, there is also a chance of BAD MEDIA... Hence I prefer RW disks...
There could be something wrong with the optical drive on the older machine,,,, got a spare cd/dvd rom to swap out and put to the test?
how up-to-date are the BIOS on that machine?If it's not a bad CD drive, then it's likely an out-of-date BIOS... but please don't ask me any questions about updating BIOS on older machines... I am losing enough hair already!
if you list all the possible causes of this issue you get:1) bad CD drive2) bad cable connecting drive to Motherboard3) bad motherboard or bad port on motherboard4) out of date or corrupted BIOSI honestly can't think of any other possible issue