Network Connections....something not understood

My set up:
Ethernet cable between computer base unit and Billion 8800NL modem-router
Ethernet cable between router and TP-Link HomePlug #1
Ethernet cable between HomePlug #2 and Freesat Box
Wi-fi connections are maintained with a Canon Multifunction printer, Digital Radio and an IPad .

I seem to have a problem or something I cannot get my head around, why it should be so. Network Connections is showing WiFi as No Connected, but the Digital radio is playing, and I have sent items to the printer.

Is there something wrong with my set up e.g. cables in wrong router ports, or not needed, something else cock-eyed, or the Dell Wireless 1707 802.11b/g/n (2.4GHZ)?
I hope someone can advise,please!

What's giving the message WiFi not connected?

See attachments!

The report is obscure in meaning to me, but it might be useful, Ihope!

chipwood said:

The report is obscure in meaning to me...

The report is basically saying...

Result of diagnosis: There may be problem
Root cause:
A wireless connection attempt is still in progress
Repair option:
Wait for the connection attempt to complete

...and apparently your connection attempt is never going to complete.

I'd go into Settings > Network & Internet > WiFi > Manage known networks, click on your Billion-8800NL and 'Forget' it. Then set the connection up again from scratch, see if it works this time.

Will do tomorrow, as out this evening. how can I get rid of the other listed routers, please?

chipwood said:

... how can I get rid of the other listed routers, please?

You can't. It shows a list of all routers that are around you. Those are your neighbours' routers.

And if they have a padlock or are Secured you can't connect to them without their password.

The ensuing tale is contained in the PDF below.long post wifi connnection problem.compressed.pdf

Something doesn't add up here.

In the attachment to post #3 the SSID of your router is shown as Billion-8800NL but post#8's pdf you show the properties of a connection called G******L (presumably one you have connected to elsewhere). This connection, or any others you use when away from home, is not relevant to your problem.

Your connection status shows you are connected to the internet by your Ethernet cable in the first screenshot, and connected by Ethernet with no internet access in the last screenshot.

If you have not already done so, in the WiFi 'manage known networks' forget the connection for Billion-8800NL. The Ethernet connection is confusing the issue. For now, disconnect the Ethernet cable. Now make sure you have your router's security key to hand and try to connect to Billion-8800NL. If you do not have the key, try to connect and when asked for it press the WPS button on your router.

I disconnected the Ethernet cable as asked, and forgot the G******L . I have created a new Billion 8800NL wireless connection, which ATM is working. :).
I had wondered about the Ethernet cable between router and computer, thinking it was maybe needed to support Ethernet over powerline adapters to my Freesat box. Seems it isn't. I hope that's so, as (OT) I shall shortly be connecting a replacement Freesat box.

Just in case it might still show anything odd. A diagnostic report is attached.