Troubleshooting/ WiFi not connecting

Hello , thought I'd reach out here to find some help.

We have a second generation yoto. Always worked fine . About a month ago I stated seeing weird glitches in the image and lights.

Also it's connected to my old WiFi router I realised. I have tried to reboot and connect a number of times , but it's refusing to connect . Got new cards for Christmas which I now can't play .

Does anyone have advice?

Thank you in advance

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