doesn't happen so much now, but it used to be a common thing with systems with underpowered PSUs, for the PSU to blow and spike the motherboard at the same time
The worst culprits were Packard Bell (when part of NEC) and Acer. Both tendied to use 145W PSUs for Pentium 4 systems. They were underpowered and heavily stressed - and went bang
It got so bad that for a long time I routinely replaced the PSU every time I replaced a m/b - I didn't want an old PSU taking my new board down and a customer complaining. Problem was both companies sometimes used cases which would only take an m-ATX power unit, not a full sized one - and that limited the options of what could be fitted
Not sure if you can get an m-ATX PSU now