"whit3rd" wrote in message
...
...have received the replacement which I haven't plugged in yet.
(When I do, it's going to be in a series with 60 watt light bulb!)

The light bulb in series is a bad plan; the power supply will, in order to
deliver
regulated output power, draw higher current due to the lower input
voltage,
and fry the fuse, even if it isn't faulty.

Most common problem that makes the fuses fry: shorted diode in the AC
rectifier (usually full bridge).

The light bulb will limit the current to around what the bulb is rated for.
That is a 100 watt bulb will limit at about 1 amp and a 60 watt bulb to
about 1/2 amp. At low current the bulb is like a very low resistance and
as more current is drawn and the bulb lights up it acts like a higher
resistance.