Sanguinololu Rev 1.3a, MINTEMP on boot

[darraughbj]

Reported to Pronterface on connection:

Connecting...
start
Printer is now online.
echo:Marlin 1.0.0
echo: Last Updated: Feb 25 2015 00:10:11 | Author: (Eddie, Sanguino 1.3)
Compiled: Feb 25 2015
echo: Free Memory: 12297 PlannerBufferBytes: 1232
echo:Hardcoded Default Settings Loaded
echo:Steps per unit:
echo: M92 X78.74 Y78.74 Z2560.00 E95.00
echo:Maximum feedrates (mm/s):
echo: M203 X400.00 Y400.00 Z2.00 E45.00
echo:Maximum Acceleration (mm/s2):
echo: M201 X5000 Y5000 Z50 E5000
echo:Acceleration: S=acceleration, T=retract acceleration
echo: M204 S1000.00 T2000.00
echo:Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum XY jerk (mm/s), Z=maximum Z jerk (mm/s), E=maximum E jerk (mm/s)
echo: M205 S0.00 T0.00 B20000 X20.00 Z0.40 E5.00
echo:Home offset (mm):
echo: M206 X0.00 Y0.00 Z0.00
echo:PID settings:
echo: M301 P19.86 I1.00 D98.93
Error:0
[ERROR] Error:0

: Extruder switched off. MINTEMP triggered !
Error:Printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting)
[ERROR] Error:Printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting)


I have exhausted what little I do know about 3d printers to attempt a solution, is anyone else able to help?

[john]

Please check the connection of the thermistors. Did it short with something else?

[darraughbj]

I have checked the thermistors individually and cross checked them both in the bed temp port. Both thermistors appear to be working properly and give proper temperature readings for the bed temp. I will attempt re-soldering the terminal to the board and report my results.

[darraughbj]

I have now re-soldered the port on the board, more than double checked that the thermistors are good, and even shorted the pins with a jumper (should have given MAX temp) and have not solved anything. I still get MINTEMP. This must be a firmware issue or something else, but not a hardware issue as far as I can tell.

[john]

Yeah, It may be a firmware issue, Can you try to re-upload a firmware? Do you have a original firwmare? If not, Please leave your e-mail and we will send you one.

[darraughbj]

Yes, I have re-upload the firmware a few times. The problem persists.

[john]

Did it read temperature correctly?
What thermistors do you use? Did them bought from us?
It looked you couldn't read a right temperature.

[darraughbj]

I purchased the 8mm acrylic kit from you via Amazon.com; Order: 106-6565273-1087461.

The thermistors work correctly, I have tested both with the bed temp input.
The extruder temp reads 0 despite all my efforts.

[john]

Could you please take some photos for you board and its connection?

[darraughbj]

Images:

IMG_20150226_143318391.jpg (282.01 KiB) Viewed 16103 times

IMG_20150226_143332124.jpg (252.85 KiB) Viewed 16103 times

IMG_20150226_143256938.jpg (371.62 KiB) Viewed 16103 times

IMG_20150226_143245835.jpg (299.84 KiB) Viewed 16103 times