Since late 2018, I have been using my TBT3-HDMI2X-83 to connect two Asus VS248H-P monitors with my MacBook Pro (15-inch, 2017) with an Quadcore i7 Intel chip (when connected, I close the laptop and have dual monitors). I’ve never had any issues, but recently my computer has been running slower and hotter when working on dual monitors, and I read that lowering the resolution from 1080p could help reduce the load on the computer. So yesterday, I began trying out different resolutions to see if I actually wanted to do this, and then when I clicked on one of the resolution options (I think it was 1344x1008 but I don’t recall exactly), the screens went black as they do when you switch resolutions, but then didn’t come back.
I manually shutdown my MacBook Pro and then powered it back up, but if the TBT3-HDMI2X-83 was connected with both monitors connected via HDMI, the laptop wouldn’t finish loading up after I logged into my profile (it would restart and say the laptop had restarted due a problem). When disconnected, the laptop worked fine, and when I tried connecting each Asus individually via each monitor’s HDMI cable directly into the laptop, things worked fine. But when I had the laptop on and plugged in the TBT3-HDMI2X-83 with both monitors connected via HDMI, one of the Asus screens would light up momentarily to say “HDMI connected” but then neither screen ever came on with the desktop image. Meanwhile, the laptop screen (which I had open, not closed) would essentially be frozen up as I couldn’t get the mouse to show up.
After I first ran into this problem and had disconnected my computer and restarted it, my ColorSync Utility appeared and said there were a handful of ICC profiles that needed repair. All were in Adobe files, but I had never seen this problem before and wondered if it had anything to do with the larger problem I was having. I was able to repair them, but my overall problem persists.
All in all, it seems like the computer and TBT3-HDMI2X-83 are interfacing in some way because one monitor tries to connect, but it never completes the process. I would appreciate any advice on how to proceed!