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.