Panel Due - Blank Screen
I have my duet wifi up and running- and am now starting focus on my 7'' PanelDue. I have erased the board - reset it, and checked the communications port [COM8]:
I ran Bossac through Command Prompt and get a successful message. However, the USB 3.0 port will not power on the screen in any way - nor will the duet wifi when plugged into the controller.
I seem to be missing something here - any suggestions on what to try next?
I tried erasing the firmware - and reloading it following DC42's instructions. I am still not getting anything - not even a glow - from the LCD panel.
Any idea's on what I could potentially be doing incorrectly?
Sounds like a hardware fault to me.
I continued working on the panel today and measured various voltages to make sure the panel was getting power. With no panel attached I measured the following at a few pins:
With the panel attached - the LED_A voltage dropped - presumambly normal as the screen acts as a resitor
I held the erase button for 10 seconds followed by a press and release of the reset button and booted up "BOSSA" instead of the Command Prompt. Running through this provided me with a new error: "SAM-BA operation failed" [A screen shot is at the following link]
After receiving the SAM-BA Operation failed message, I went back to command prompt and ran through the same process as I original did - and received a "verify successful" message again, but still no response from the PanelDue.
Any other suggestions on troubleshooting before I send the panel back?
Check that you have mated the TFT panel to the control board correctly. It's quite easy to plug them together so that the pins are out of step by 1 pin, in any of the 4 possible directions.
Assuming that's not the problem, if you bought the PanelDue and the TFT panel together then I suggest you ask your supplier to replace both of them. The fault is probably in the TFT panel, but it's also possible that it's in the controller.
PS - also check that there is a jumper in the 3.3V position of the voltage selection jumper pins.