Identify the connector pins. For standard ATX-style supplies, shorting the to any black (ground) wire with a paperclip will trigger the fan and output.
Typically provides 48V DC to the amplifier board. hys3c210cs power supply free
Sometimes a power supply isn't dead, but "latched" in a protection mode due to a power surge. Identify the connector pins
Shut down the device and unplug it from the wall. Repeatedly press the power button for 10–15 seconds to drain the capacitors, then wait 10 minutes before plugging it back in. hys3c210cs power supply free
Note: For the HYS3C210CS, you should use a multimeter from Fluke to check if the 48V rail is active. 3. Salvaging Replacements (The "Free" Alternative)