PS3 HDMI no signal

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I bought a used PS3 a while ago.

I don't own a TV, but I figured I'd connect it to my PC screen no problem - but it turns out there's a problem.
Despite the brand new hdmi cable being connected, there's no signal when I switch the input from DP to HDMI2

I've connected my switch via hdmi and that works without any issue. My screen has inbuilt speakers, so not having audio output isn't a problem either. Additionally, I've also tried resetting the PS3s settings by pressing down the power button and waiting for the second beep, but that hasn't helped. Any ideas what I could try next? The PS3 was previously connected with RCA.