Korg Trident Synthesizer Repair Service. This trident arrived in my workshop without working. The suspected customer had a defect in the power supply. And he was right. One of the voltage regulators was defective. After the replacement, the synthesizer turns on again. But he still didn't make any sound.
The cause of the other malfunctions were defective electrolytic capacitors. These capacitors once again showed their leaking electrolyte on the legs and the electrolyte had already caused damage to the circuit boards. The circuit board was freed from the electrolyte at the appropriate points and interruptions were restored and protected against further corrosion with solder resist.
In this synthesizer every single electrolytic capacitor was defective again. Here are a few more examples. Even if it looks like it, it's not the same Elko. Just the same value. So they look pretty much the same.