Nikon MH-23 quick charger doesn't work.
I have a Nikon MH-23 quick charger. Some months ago, it suddenly stop charging the battery. Even the LED indicator doesn't turn on. I checked the fuse and it's ok. The voltage after the diode bridge is correct. The control IC also has voltage to feed it (5Vdc). In the output of the the flyback secondary side the voltage is also present (8Vdc). I tested the LED individually and it's fine, in fact I notice that the control IC don't send voltage to it.
Apparently neither component looks like broken or burned. Ofcourse, I know it doesn't assure the correct operation of each component. I believe maybe some protection is already activated. Some one have an idea of what's happening or how I must proceed to check it?.