Lora 32 v3 board failures

I’ve been working with two of these boards over the last couple of weeks. A few days ago the OLED began to malfunction (blank horizontal lines thru the graphics), this morning the other board no longer connects to wifi. I also have Wifi Kit 32 v3 boards and they connect fine.

Anyone else been experiencing v3 board failures? Is there a workaround, am I doing something wrong (again, they were working for over a week).

Thanks in advance.