The T100 has a HDMI OUT feed however it is not passthrough, the video signal is reprocessed and any interlace signal is converted to progressive.
If you need the original feed, or you want to separate the signal a splitter is an affordable solution.
- Option 1: CKITZE ($20) https://www.amazon.com/gp/product/B0089DSLMY/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
- Option 2: SEWELL ($30) https://www.amazon.com/gp/product/B007WR0CHU/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
- USB Power Cable Replacement ($5) - https://www.amazon.com/gp/product/B003MQO96U/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
If you use the USB Power Cable Replacement (as shown below) then you can plug it into the T100's USB port for power.
The splitter has a microprocessor inside and requires power (wall adapter or USB replacement cable). If you try to run the feed without power, the video will probably not display on either the T100 or screen.