Geeetech

I discovered it was a PID problem and fixed it. The link below is very good and also a good explanation of how it works. I only did the hotend as the bed temperature was fine.
https://www.3dmakerengineering.com/blogs/3d-printing/pid-tuning-marlin-firmware
I am still a bit mystified as how it started ...

I am using Repetier Host with Slic3r and when printing from SD card the printer does it's bed heating cycle then homes and heats the extruder. Then it just sits there displaying "E1 heating" and doesn't start the print. I am not sure if it is in the G-code and here is the first lines

M107
M190 S90 ...