I wasn't certain if they were USB or HDMI. If the signal were coming in over USB, I would still have concerns the 10yr old TV wouldn't handle it.
For myself, I'm deep in the Apple ecosystem. Also, I've never met a universal remote I didn't want to smash within 5 minutes.
They have a USB port, but only intended for connecting while iTunes is open, to set it up or restore to default (I had never used this for setup and it was the only unit I've needed to restore).
It wasn't the remote's fault, the ATV's white LED only blinked when I used the OEM remote, too. I called the day it puked and was told that it had gone obsolete, apparently while I was working with it and at that point, after restoring, it will work, but there are no updates for it and apps can no longer be added.
Which universal remotes have you used?
Universal remotes work great if:
They have a good database for commands and the code is complete with no missing characters.
The programmer understands what the equipment needs and what the remote system can do. WRT delays, a good example is Denon's need for a delay of 5 seconds or longer between Power On and any input command for their older AVRs (correctly timed delays have been a part of this, going back to about 2000). Once they made it possible to use an inpuit command to turn on the AVR, that went away. Other devices (like cable boxes) were still a problem because they didn't use discrete commands for Power On/Power Off. The boxes could do it, but the cable providers removed it from the command set.