Cables
- Built-in Thunderbolt cable
- Built-in Universal MagSafe cable (up to 85W)
Peripheral connections
- Three powered USB 2.0 ports
- FireWire 800 port
- Gigabit Ethernet port
- Thunderbolt port
- Kensington security slot
--------
The USB-A ports on the display are NOT inputs. They are not fast enough for display data.
They are intended for use with slower devices like keyboards and mice -- maybe a hard drive, but never the display itself. The display has a ThunderBolt-2 Hub that splits off regular USB-A ports, but it does not work back the other direction.
By contrast, If your cable situation were different, it is likely that the Thunderbolt port COULD be used as an input, in place of the captive ThunderBolt cord.