Xbox One X Crashing to dashboard

Hiya All,

Im hoping anyone can help me out as I am out of ideas what to do with the box of junk which is on my desk at the moment.
Its a One X 1 Tb Model 1787 which in various games keeps crashing to the Xbox Dashboard.
What have I tried?

Replacing Harddisk, tried 2 different drives.
Replacing Sata Cable
Replacing PSU
Re-Applying thermal paste

But none of this seems to fix the issue…

While replacing the disk i used the latest OSU1 downloaded from Microsoft.
These problems were also present on older updates.

Is there anyone who can point me in the right direction to get this resolved?

Thanks a lot!