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I also have a laptop opening tool, from when I was working on Compaq's (like this one https://www.routerforums.com/attachments/cpq_wedge-jpg.884/, but mine is black.).
After posting the above picture link, I though I would take a look at the site because a router forum may be interesting.
It's about woodworking routers not networking routers. LOL 🙃
I've got the casing off now and the 2.4ghz is still throttled to ##~## despite having cooled the heatsinks (which were initially hot to the touch)
Restarted it, same problem.
Getting throughput of around >0.2mbit/s but appears to recover with lower/no traffic during the night (hence the heat theory).
It's a PoS router. Also the design is horrible with no obvious place to add a fan unless I take a drill to the back and mount one on the outside.
Edit 1: Well, after my hissy fit it started behaving itself. Going to keep it cooled for now and see how it goes.
Edit 2: Cooling makes not difference, it's still erratic. I've now split the 2.4ghz devices (of which there are <10) between the main and guest WIFI to see that solves anything. Not holding much hope.
If i can remember think there was about 5 aerial socket. But only two had a aerial connected one on a wire and 1 on the board . Bet the chip would run cooler if you connected the other aerial socket to a aerial