When you say you have swapped the Mobo, CPU and so on, did you do a full format and reinstall of the OS?
I realise that you said you tried an XP reinstall, but was that an in place reinstall or a full format and reinstall as I previously mentioned?
OnePlus 5 review
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iPad Pro 10.5in (2017) review
Comment faire une capture d’écran sur un Mac ?