How do you notice defective GPU RAM HDMI defective on a PS4 slim how do you notice that?

Ki
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How do you notice defective GPU RAM HDMI defective on a PS4 slim how do you notice that?

So

By not going any more. Sounds logical, doesn't it?

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If your graphics card RAM or CPU is broken you will notice this. If there are image artifacts, it is usually the GPU.

Gi

If something should be defective (which is very unlikely even after 10 years) you will notice that nothing starts anymore.

A CPU, RAM Can't be just a bit defective. If so, that's a total failure.