How to run diagnostics on "Anycubic Chiron" 3D printer?

Bought an Anycubic Chiron 3D printer from amazon and found the heating plate failed to heat at all. Upon reddit's recommendation I outright returned it and requested another to not take chances. Now I have my replacement printer and yet again the heating plate refuses to come up to temperature. Is there any way to manually check and see if there is something wrong I can fix on my end or is it yet another return? Any help will be sincerely helpful.

have you tried setting the temp via the control panel, just to check it isn't something in the g-code ?

If it won't get up to temp when not attached to a computer - then it's defnitely faulty.
It does appear that quality control is an issue on these.