blue screen and hot bed problem

Had started a print and then the filement stopped feeding. I went to change something via the screen but noticed it had froze. Then shortly afterwards the screen went to a blue screen. I also noticed the bed was hot (hotter than the 60 deg I had set it too). |I have checked the wiring and all looks ok. I pulled out the bed thermistor connectors to see what would happen. I thought that the bed would not heat-up but it still kept getting hotter. Tried to do a firmware update but that was not successful. Aldo when I start it up the print jumps around for a few seconds.

I was hoping that someone has had a similar problem or any idea what is going on.

Thanks

Which printer are we dealing with?