I have two Micro OLED Qwiic boards (product [LCD-14532.) One has been working without fail for several weeks. The other one, I hooked up to an Artemis Redboard (via 50mm Qwiic cable) last night for the first time, and ran a test program that cycles through 64 64x48 bitmaps, at one per second, then starts over. I left the program running overnight… When I checked it after about 6 hours, the OLED was dark, but the program appeared to be running.
Is there is a limit to how long these displays should be on continuously? If so, what is that time limit (so I don’t continue to burn them out)? Thank you for any information.](SparkFun Micro OLED Breakout (Qwiic) - LCD-22495 - SparkFun Electronics)
OLEDs will dim the longer they stay on, but overnight wouldn’t be noticeable. I imagine they may burn out after a long time (10s of thousands of hours?)
What happens if you swap in the working display for the bad one? 6 hours shouldn’t have burned anything out.
The good one works as expected. And if I put the ‘bad’ one into the device the good one was in, it doesn’t work.
If it’s important, the one that quit working was attached to an Artemis Nano, and the one that is still working is attached to a QWIIC Micro (SAMD21E), but I just checked, the ‘good’ one works just as well with the Artemis. The ‘bad’ one does not work with the QWIIC Micro or the Artemis.
What it was attached too shouldn’t matter, but it looks like there’s a hardware defect somewhere in the one that failed. I’ll PM you with more information. 
Thanks Chris! I’ve replied to your pm.