Belkin Wireless Router PSU failures

For the second time in the last few weeks I've been called in to fix
a failed Belkin wireless ADSL router. In both cases the power supply
unit (12v @ 1.25A integrated into the mains power plug) had stopped
working for no evident reason. [This PSU is probably limited to the
UK and maybe Ireland, because of the territory-specific integrated
mains plug.]

Symptoms are no networking functionality ata all and no LEDs showing
on the router front panel.

I wonder if this is a design or manufacturing quality issue that may
affect others... has anyone else experienced similar problems?