samsung ue55ks7000 advice with auto switch

[Arizolas]

Hi

So I have an old samsung ue55ks7000, I have ps5, switch & sky plugged in via hdmi.

Usually when you turned on the ps5, switch or sky it would turn the TV on too or if the TV was already on it would flick to the right hdmi

However for the last 4 weeks or so this suddenly stopped, no idea why.

I couldn't see anything obvious in the manual, anyone got any advice for this TV.

Thanks in advance