Unidentified Network

Hope I'm posting this in the right place.
Seem to be having the same or similar problem as a few others.
This problem started after a power outage of about three hours four days ago.No problep prior to that.
WiFi connection ok (but slow).
Ethernet connection (via home plugs) non-existant.
On opening settings from charms bar Ethernet connection says Unidentified Network.
I've tried several solutions including
Reseting Router
ipconfig/release etc.
TCP\IP stack repair etc.
Disabled/Re-enabled Network Adapter and updated driver
Tried to set IP address etc manualy
All above several times
Two days ago resorted to full reset of windows 8.1 (took about 1000 hrs)
all to no avail.
only thing I can see that looks wrong is IP address 169.254.245.10

Any advice please.:(

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 8.1, 64 bit
Processor: AMD A8-5500 APU with Radeon(tm) HD Graphics, AMD64 Family 21 Model 16 Stepping 1
Processor Count: 4
RAM: 3542 Mb
Graphics Card: AMD Radeon HD 7560D, 512 Mb
Hard Drives: C: Total - 889874 MB, Free - 655943 MB; D: Total - 61439 MB, Free - 42922 MB;
Motherboard: MEDION, MS-7800
Antivirus: Avast Free (plus Malwarebytes as required)