UPDATE 2/2/2023 The unit was sent back to Anker for a full refund. I cannot fault their support (thanks Alyssa). But, the bottom line is that I could NOT get this dock to drive the TV in my offjce. See below for details.
I wanted to like this dock. It is made well. HOWEVER, HDMI just doesn't work. I have been talking with Anker tech support. They had a variety of suggestions to troubleshoot however this was of no help.
I have now tried 4 different HDMI cables from the 777 into the TV in my home office. I tried both HDMI ports on the 777.
NONE of these cables to the TV work when connected to the 777. ALL of the same cables work when directly connected to the HP laptop. One of the cables that I tried also works when connected to my Vankyo projector. That same cable also works when connected to various TVs in locations where I teach.
I do NOT have DP to HDMI cables or USBC to HDMI cables and do NOT want to go on a cable hunt just to test out this Anker device.
The common denominator that fails is the 777 dock, therefore I CANNOT recommend this dock.
I have a variety of Anker products and like the brand a lot. HOWEVER, although I like the dock itself...it's no good to me as it just doesn't work with the HDMI ports.
I now have a separate part of Anker offering a refund. I had previously sent back both the dock and stand to Anker in Ontario, CA as directed by Anker support. They processed a refund BUT only for the dock and NOT the stand. I’m still trying to get the refund processed for the stand. Maybe if others return this dock and stand….they should go through Amazon and not Anker…that is probably much easier?
I still like Anker products and have used quite a few in the past. I will continue to use them as my needs dictate. UPDATE 2/8/2023 I have found out after returning the Anker 777 dock that it "may" have been OK with HDMI. HP states that my laptop has "(2) USB4™ with Thunderbolt™ Gen 4 Type-C port; 40 Gbps signaling rate (USB Power Delivery, DisplayPort™ 1.4, HP Sleep and Charge) "
One would think that from item 2 above that both the Thunderbird4 ports are identical, right?
I can tell you that HDMI via the dock works OK to my office TV when the Thunderbolt4 cable supplied with the dock when plugged into the Thunderbird4 port on the right side of the HP laptop. It does NOT work when plugged into the port on the diagonal right rear corner of the laptop. This leads me to the conclusion that either that corner port is faulty or is just NOT the same as the port on the right side of the laptop.
I have raised my review to 4* on Amazon and posted this information there also. I hope that this may help you or another customer.