PinecilV2 OLED stopped working

[slura]

Hi! Was using Pinecil V2 for half a year mostly with a Lenovo 65W PD3.0 without any problems. And sometimes with Xiaomi powerbank which supports 15V/3A/45W PD 3.0. One day display stopped working. Dissembled the unit. 4.6V is there after a buck converter. 3V3 is also after the LDO. Firmware flashes successfully. Tried IronOs V2.22 and V2.20. Tried to press '+' button after powering on, tip doesn't get hot. 

Should i try replacing the OLED? 

Any suggestions? Thanks!