Is my display toast?

Products & Technology Grove
#1

I have the Grove 0.54 inch Red Dual Alphanumeric Display hooked on a Seeeduino Nano (plus a UV sensor), powered by a 5V powerbank over the USB-C connector.

Everything worked fine until this morning. As usual I plugged-in the powerbank, the display showed a number as expected, then after about 10s it went black (not normal) and the blue PWR led on the Nano started flashing rapidly.

When I hook the Nano on the serial monitor I get normal outputs: the Nano and the sensor are working fine.

Unplugging the display and plugging it back in makes it work for about 1s now, then it goes black.
I think my display is electrically toast, but is it?
Is there anything that can be done to verify this is a different way?

Thanks

#2

I’m not sure, I suggest you follow the wiki documentation and do some testing. @svdb

#3

Thanks but I did. The wiki wasn’t useful.
This is a working UV detector fully build in a 3D printed enclosure that has been working for 6 months now.
I’m a software engineer and unfortunately not an electronics engineer. How does one test that display?

#4

I feel very ashamed that our Wiki is not very helpful to you. I hope to ask you some specific questions. Are there any mistakes in the content? Or where there are imperfections. @svdb

#5

Hi Baozhu,

The wiki is well written and helps with using the module, but it contains no hardware troubleshooting information.
https://wiki.seeedstudio.com/Grove-0.54_inch_Red_Dual_Alphanumeric_Display/
At the end it only says " Please submit any technical issue into our forum".
So this is what I did.

The module is inexpensive so I just bought another one. Now my device is working again and I can confirm that the previous display has an issue.
I wish I could find the information on how to find what is wrong with it.

Thanks