I have recently has min temp and max temp errors on both my ender 3 & 3 V2 so I purchased new heater cartridges and thermistors. Replaced them and now not heating at all... I dont know what to do at this point, any advise is very much appreciated! Ender 3 has 4.2.2 GD motherboard Ender 3 V2 has 4.2.7 motherboard HELP!