As a Synology owner of a DS1513+, I have been getting faultless reliability from my NAS over the last 5 years (including the drives). However, I was surprised to find out the hard way, when I turned up to work for a client, their Synology DS1815+ NAS was sitting powered down. When I looked closer, the power cord was indeed connected to the box, however it refused to power up.
The reason it turns out, is that there are two main issues at play with certain Synology models (including the DS1815+) :
- the Synology NAS contains an Intel Atom C2000 series CPU (which has a known fault)
- the power supply inside the Synology NAS simply failed
Intel indicated in its January 2017 revision of its' Intel Atom C2000 Family Documentation, that the chip line contains a clock flaw. Errata note AVR.54, titled "System May Experience Inability to Boot or May Cease Operation," explains that the Atom C2000 Low Pin Count bus clock outputs (LPC_CLKOUT0 and LPC_CLKOUT1) may stop functioning. Permanently. The Synology DS1815+ is powered by an Intel Atom C2538 Processor.
The other common problem is the power supply fails inside the unit. There are notable examples on the internet to test for, and work around this common issue. If warranty isn't an issue and you are comfortable taking apart computer hardware, by all means try it. Otherwise, send it back to your place of purchase to get it repaired.
Synology's statement regarding the models affected by the Intel Atom C2000 Series bug is contained below.