Jack, W8TEE and Al, AC8GY produce the JackAl Board add on for the µBITx. They are warning that two JackAl owners have reported that a voltage spike destroyed their RA8875 display.
Al has looked into this and found that there is a very narrow voltage window on the display. Buydisplay confirms that 4V on the 3.3V line can ruin the display. From what we can determine, voltage spikes were the culprit in both cases.
What the JackAl team is doing is creating a very small PCB that will clamp the supply voltage to the display. Parts for the board will cost less than $2.
They will send one of these PCB boards to JackAl owners at no charge with a request and a SASE.
Further details will be provided when the boards come in. Jack and Al are also expanding the documentation and hope to have a new assembly manual shortly. Announcements will be made on the BITX20 IO Groups list and this article will be updated accordingly.