This Synology NAS is used by my parents. Suddenly the NAS was not working anymore. No lights, nothing. Just some ticking noises from the power socket.
After removing the 2 hard drives the unit was still dead. So the drives weren’t the issue, Next step, removing the PCB. There must be a short somewhere because you hear the sound (sparking) from the power socket itself! After some measuring i found a defective tantulum capacitor. After removing this the short was gone and the unit powers up again! At this moment i will not reinstall a new capacitor. Maybe i order a new one some time.