printer not working after changing circuit board

[nutts]

I am using Adruino 101

[appswert]

I did not see anything like you have on your screen

You don't see any output in the seriak terminal window?
Or you can't find it at all?

I'm using Arduino IDE 1.6.9
1) I go to Tools-> Port and select the Com which appears/dissapears when unplugging the board
2) I go to Tools->Serial Monitor (Strg+Caps+M)
3) I change the baud rate to 250000

[nutts]

I disconnected the usb cable while the printer was on and the com port did not change at all

[appswert]

Try to use a newer version of arduino IDE...
With your version i have the same problems...
Thy the latest one 1.8.3 (get it from the arduino website)

[appswert]

If the Com port doesn't change than in 99% of all cases your computer is missing device drivers for your board...
1) If you are using Windows 7 (or equivalent)
Go to StartMenu->and search for Devicemanager and open it (needs Administrative privilegs)
see https://www.lifewire.com/how-to-open-de ... er-2626075 if you have troubles
2) Connect/Disconnect your board and watch out for changing entrys...
(Normaly your board should appear under "Ports COM&LPT"
If it has an yellow triangle next to ist you need to rightclick the device and select update device driver

Geeetech wiki entry describes this too for (win xp):
http://www.geeetech.com/wiki/index.php/ ... re_setting

[appswert]

I disconnected the usb cable while the printer was on and the com port did not change at all

Without the right drivers/ a working com port you want be able to upload anything to your board and wont be able to access the serial terminal (to send commands)

[nutts]

When I look at the device manager it shows Com 2 going off when I unplug the printer and that is the one I have selected in the printer program

[appswert]

When I look at the device manager it shows Com 2 going off when I unplug the printer and that is the one I have selected in the printer program

What do you mean by "the printer programm"? The Geeetech easy print thingy?

1) Is there and orange/yellow triangle next to COM 2 in windows device manager?
2) Only one programm at the same time can access a COM-Port ... So in order to use it at arduino ide you can't have other programms running which try to access it...
(So close Easy Print if it's running!)

[nutts]

In the firmware I have com 2 selected. None the printer programs are running at the moment.
I really think the com 2 port is the problem.
I have gone into devise manager and tried to up date the port but windows says the port is up to date

[appswert]

In the firmware I have com 2 selected. None the printer programs are running at the moment.
I really think the com 2 port is the problem.
I have gone into devise manager and tried to up date the port but windows says the port is up to date

Normaly if Windows say up to date it means that your device drivers are installed corectely.
Can you select COM2 in arduino ide?
And if you select COM2 in arduino IDE 1.8.X can you see something when your printer starts up?

If COM2 / the firmware flash wasn't working all the time than your problem is very likely to be that the stock firmware is still running on your board.
And I guess Geeetech didn't configure it right for exactly your printer moddel (how should they, they don't know which printer you have when you bought the board).

Is the firmware even uploading (indicated by the # loading bar if you have the "Output on Upload" settings enabeled (as described in my earlier post)?

If not then you need to fix the issuse with the com port first...
Things you can try:
1) Find out which serial-to-usb chipset your gt2560 is using (FT232RQ) and install the device drivers manually
http://www.ftdichip.com/Drivers/CDM/CDM ... tified.exe
More info here: http://www.geeetech.com/wiki/index.php/ ... he_drivers

2) Try a different computer (maybe with different os win7 win8.1 win10)