Using raspistill -fp -o test.jpg causes my monitor (actually a tv) to receive no input (just get a blue screen) for the duration of the preview. This also happens using the python picamera module with the max resolution.

I'm semi certain that I had this working before on the same setup but I'm not sure what, if anything, I've changed.

I've tried playing around with a few of the settings in /boot/config.txt but not totally sure what changes to make.

Any thoughts?

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