Voici les tests à faire par synology, ça peut aider d'autres:
Conducting the Power Button LED Light Test
Statically discharge yourself
1.) Remove all peripherals connected to the Synology device (USB, eSATA, Ethernet). Please also remove any RAM you may have added if using a model that has RAM expansion capabilities.
2.) Remove the power cord to the Synology device.
3.) Remove the Cover to the Synology device.
4.) Remove the power cords to the HDD, from the motherboard – or remove the HDD from the Synology system
5.) Connect the power cord to the Synology System
6.) Power up the Synology system and wait five minutes.
7.) What is the status of the power button LED light? Blinking or Solid? ( The power button LED light will be blue on blue on most models, and green on some Rackstation models)
If it continues to blink, please send a copy of your invoice for warranty verification.
If it’s solid, put the disks back in and boot the system. Please wait a few minutes and check the status using the latest version of Synology Assistant. If it can find it, please note its status (Checking Quota, Ready, Not Installed, Migratable etc.). If not, please reply back for further instructions.