Powerline adapters not accessing sleep mode

I've just upgraded to BT Infinity, and since the router and PC are now in different rooms, and my PC doesn't have wireless, I bought some Powerline adapters, one connected to the Hub and one connected to the PC. However, even when the computer is switched off, unplugged and disconnected from powerline, the unit connected to the Hub won't go into sleep mode - it flashes regularly once per second as if it's communicating with the Hub. Is this likely to be the case, and if so, how can I stop it? The units I'm using are TL-PA251KIT.
Thanks in advance for any help and advice
Solved!
Go to Solution.

The home hub will still keep transmitting data as it continually sends broadcast frames to discover new devices and find their MAC addresses, which it then stores.
This will stop the powerline adapters from going into sleep mode. The only way to stop that would be to unplug them from the hub, and eventually they would go into sleep mode.
I doubt very much that they use much power anway.
There are some useful help pages here, for BT Broadband customers only, on my personal website.
BT Broadband customers - help with broadband, WiFi, networking, e-mail and phones.

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I have found several threads relating to this topic, none of them offering a solution, which worked for me.
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