My home Belkin network has stopped working. The F5D4077 powerline link LED is displaying a solid red colour. What does this mean? How do I resolve this problem?

SOURCE: D-Link wireless router and Belkin Wireless G USB Network adapter

Set your wireless network as a preferred network and to automatically connect to it. Also set it at the top of the list so that it takes precedence. If you continue to get conflicts, change the channel of the router.

Mike

SOURCE: I have two Belkin powerline adaptors 200mbps type

Your hard disk is failing and should be replaced. Have you tried to press F1 when you get the message? If this doesn't help try to enter the bios and disable S.M.A.R.T.
Your first goal is to save the data so please do that before it's too late.

SOURCE: I have been using my Belkin powerline adapter

Is the same phase used in your office?(electrical wiring)

SOURCE: Trouble expanding my Belkin Powerline network

F5D4075 uses Homeplug AV standard and F5D4071 used Home plug 1.0 Turbo. Both are not compatible to each other. So if you form a network, you have to form with the same standard.
Secondly, You need just one Powerline adapter on the router and you can have 2 or 3 adapter connected to 1 computer each and all these computers can connect to the 1 adapter on the router. You do not have to use it in pairs

SOURCE: what does a red light for powerline activity mean?

It indicates your line quality for the Homeplug - Green: Best, Amber: Better, Red: Good


Details here http://www.zyxel.com/uk/en/products_services/pla_401_series.shtml