Panel Due - Blank Screen

swinter

Hello,

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]:

https://drive.google.com/open?id=0BzrZTS44KHYxaW1reFpJUFFTZUk

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.

https://drive.google.com/open?id=0BzrZTS44KHYxVWhNaVViYWs1YzQ

I seem to be missing something here - any suggestions on what to try next?

Thanks,

Simon W.

swinter

Hello all,

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?

Simon W

dc42

Sounds like a hardware fault to me.

swinter

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:

3.3V: 3.292V
5V: 4.633V
LED_A: 3.245V

With the panel attached - the LED_A voltage dropped - presumambly normal as the screen acts as a resitor

3.3V: 3.285V
5V: 4.478V
LED_A: 0.305V

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]

https://drive.google.com/open?id=0BzrZTS44KHYxaWtGOUJiUmFwVzA

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?

Thanks,

Simon W.

dc42

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.

dc42

PS - also check that there is a jumper in the 3.3V position of the voltage selection jumper pins.