Out of the blue, my DS207+ lost connection to my notebook where it was a shared disk. On the DS207+, the LAN light was dark, also on the LAN switch. Changing the Ethernet cable didn't help changing the switch port neither. Usually the DS207+ switches of when the power button is pused for a few seconds. Not this time. Since the disks appeared idle, I pulled the power cord. After a few seconds I pugged it in again. And the DS207+ was switched on again. The network light was lit and the LAN switch recognized it as LAN device. But there was no connection to the windows. After a bit of trying the LAN light vanished and the LAN switch went also dark on that port. Again powering down required the power cord be pulled. And now after powering up, the blue light is blinking. The installation guide doesn't mention this, but I'm sure to have read about such details... still investigating...
Firmware is presumably the latest, updated a few weeks ago.
According to http://www.synology.com/enu/support/hel ... p?q_id=366
... I need a new motherboard, what a bummer. Well then.