For over a decade, I was running my home server on a trusty AMD Athlon II X4 PC, without any issues.
After upgrading to a newer motherboard the retired one was left unpowered for several months. Then when powering it up, Linux would not boot on it no matter what I tried.
Various distros were attempted, including Xubuntu desktop, and Finnix (highly recommended for testing and troubleshooting from the command line). The symptoms were the same: the PC reads the media, then the screen flickers and goes black with nothing on it.