Ok, let's split this up into two problems. Board 1.1.4 'works', and may be useful to find hardware issues. Board 4.2.7. doesn't (yet), most likely due to incompatible firmware (thanks Creality).

The high temp value suggests a short directly across the thermistor. Hopefully, that's all it is, and there isn't any board damage (e.g., https://support.th3dstudio.com/hc/gu...-or-lcd-blank/). To test, switch the bed and hotend thermistor at the board, and see if the high temp value changes to the bed.