My new 10 Mini is a DOA as the unit thinks the bed is too hot and waits forever for it to cool. At room temp the bed is showing as 79 deg C, even with the connector for the bed thermistor pulled. Is this a normal value, inidcating the bed thermistor is open-circuit? Can somebody pull the bed connector on a 10, 10S or Mini and let me know what the bed-temp readout on the LCD says? Thanks !