ROCK 5 ITX添加常见问题说明

[RadxaYuntian]

通电无法启动，可能是没有预装Roobi

[RadxaYuntian]

来自ARA8288

[tangzz-radxa]

Thanks for the report. I've added a FAQ note to the ROCK 5 ITX quick-start page: if the power LED lights up but the HDMI display stays blank after power-on, the ROOBI OS may not be pre-installed on the eMMC, and users are directed to the Manual reinstallation section to install the system via microSD boot disk or Maskrom mode.

Fixed in PR #2010 (zh + en).