In need of a new controller

If you haven’t yet I would have 1F go through their troubleshooting steps. I think one of those steps would be to reflash the memory card. I would do a fresh install using a PC and a micro SD card reader/writer. If you live near a Best Buy you can buy a new card for about $10 so you’ll have a spare. You can buy a card with the latest firmware already installed from 1F but you’ll have to wait for delivery.

Here’s the instructions on how to do it.

Here’s 1F’s link to the correct Raspberry Pi. It looks like your link is also the right one but this one is a bit cheaper.

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