Hi, congratulations on the success of your product. I appreciate all of the work you’ve done to get it this far and the high quality of the support you provide here.
I’m having a problem at step 12 when trying to pass the first functionality test. When I power on the device nothing happens, blank screen. With my multi-meter I’ve measured voltage at a number of different places:
ATMega328, VCC and GND (pins 7 & 8): 3.489
5110 LCD Module VCC and GND (pins 1 & 2): 000.0
5110 LCD Module GND and LED (pins 2 & 8): 1.390 (LED is not on)
Let me know if there are any other readings I can provide that will help you troubleshoot the problem.
I have a good amount of experience with soldering so I suspect that is not the problem but can’t be 100% sure of course. I don’t see any bridges. The resistor and the regulator are not swapped and are facing in the correct direction. The polarities on the electrolytic capacitors are correct. The micro-controller is inserted in the correct direction. Joints I can still see look good. I have an oscilloscope on hand if that helps, as well as a good selection of transistors, regulators and the like. I can also burn the Gamebuino bootloader onto a different ATMega328P and try that if you think it would help. I don’t think the problem is with the 5110 because I happen to have another one on hand and I can line up the holes to make connections to the second screen and still no results.
As a new user I can only put one photo in the post, so I tried to select the most relevant shot.