This is the second HP power supply that the toroid has fallen out of the PCB.
Since it is the second one, I knew to look ofr it and take a picture while still in the power supply.
Can't tell if it's concidence or smart engineeering:
PSU oveheats, toroid solder joints melt, toroid falls off, no more heat !
It's also conveniently mounted upside down - - so gravity helps.