Some time ago i broke my logitech Z523 speaker system somehow. I tried looking for faults in the various components, no obvious ones to be seen though. I found out the fuse was dead, took the chance and replaced it with a jumpwire. Blew a fuse in my apartment instead, oh well. I then found out that the rectifier diodes (RL207) are all dead. Not sure if that happened before or after i did the jumpwire stunt. Anyway, i've been trying to find the fault since (if it wasn't the diodes), and just learning the pcb and circuit to learn electronics better in general. And i found a resistor of 4700 ohm shorting out the output. That seems really weird to me.
Here's a picture of the power supply and a very crude and incomplete sketch
and here's the bottom of the pcb, showing the 12V output with the 4,7k
resistor.
So why short it out like this? To bleed out caps?
Also if anyone has any idea what might've gone wrong let me know. I've checked a lot of caps (no visual signs of damage), and unsoldered a few components to be sure. But can't find anything faulty beyond the rectifier diodes.