A20 SD card printing hanging

[Magpie]

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
M104 S240
G28
G1 Z5 F5000
M109 S240
G21
G90
M82
G92 E0
G92 E0
G1 E-2 F2400
G92 E0
G1 Z0.2 F7800
G1 X104.463 Y112.728 F7800
G1 E2 F2400
G1 F3000
G1 X106.706 Y110.857 E2.08469

I have printed from the card in the past with no problems and have tried pre heating and starting from scratch with the same results.
Can anyone advise me on how to fix this problem?

[William]

Hi, this page is the function corresponding to the gcode instruction, you can refer to it.https://marlinfw.org/meta/gcode/.
You can use this instruction：
G28
G1 Z15 F300
M107
G90
M82
M104 S215
M140 S55
G92 E0
M109 S215
M107
G0 X10 Y20 F6000
G1 Z0.8
G1 F300 X200 E40
G1 F1200 Z2
G92 E0
G28

[Magpie]

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/blog ... n-firmware
I am still a bit mystified as how it started as when I first started using the printer everything was fine. I'm wondering if it was not factory set during testing or something else.
I have my wonderful printer back and I'm very happy.