
Hello all, I received my NanoVNA v2.2 a couple of weeks ago. At first it worked like a charm, but after a while I sometimes had a white screen at bootup, and sometimes the VNA became stuck while operating it via the touch screen. At first I thought of a broken screen, so I ordered a new one. Its however no solution, because with the new screen fitted the behavior is the same. I can connect to the unit via USB and run an upgrade if I boot it in DFU mode, so that's all fine.
Based on the schematics I checked the connection between MCU (U303) and the display, and this is good to, so no soldering issue. It is strange the issue has popped up, cause at first usage there was no such issue. The unit has not been dropped or misused.. Any suggestions on what to check or what could be the problem?
Thanks in advance!