Allied 500Watt PC Power supply repair. Model Al-B500E
My Allied 500Watt PC Power supply, Model Al-B500E would not power back on. As is many times the case a secondary smoothing capacitor, C27 , had gone very leaky. As most of the capacitors in the power supply were the same make, G-Luxon I replaced them all with decent Japanese
capacitors from Mouser.com.
Ideally, to perform this repair you would use a good high temperature soldering iron,(hot enough to remove the heatsinks), a good solder sucker and desoldering braid. Alternatively, if they still exist, a TV repair shop should fix this easily.
I repaired this power supply around 5/2009 the system has rab 24/7 since that day without issue!
Note: The primary side of a switch mode power supply will have potential lethal voltages when running, and that big smoothing capacitor can hold a nasty bite for a while after it is powered off.