This page lists the known errors that are present in the 4Kopen Board (B2264).
When using the analog audio output, the user may notice significant noise on the output. This document outlines how to address the issue.
Note: if the analog audio output is not being used (e.g: you're using HDMI), then there is no benefit to conducting this rework.
MicroSD Card Operation at 1.8v
The rev. B boards do not correctly support SD Card operation at 1.8v, and thus high-speed signalling is unavailable.