8v 2.5a load is not too much. It’s well within the spec of the psu. I have one at work that runs 13.5v 3a and 22v 3 amp for most of the day if I’m running a particular product test.
What was the ambient temp when it faulted, other channels on / off / why load?
How old is your 832? Is it the one that has the heat sink issues on the to-220 shown in Dave’s videos?
I only do very low voltage stuff - mainly old TTL/CMOS stuff and a bit of IoT - so my typical load is 5-9v and less than 1Amp. The unit is almost 2 years old, and I did check it for Dave's "fix" and that seems to be in place (large heat-sink just inside the grid). This is done in my home office/shop - the temperature is somewhere between 20-25 degrees depending on how hot the computers run at that time.
So typically I only use the 3rd output - except when I need a negative rail. I just had some "new stuff" to test which had less than 10ohm resistance so the amps ran up with 8v.
Typically the issues I have are due to user-error. Perhaps that's what happened here - not sure. Of course once I had the whole unit disconnected, and I'd posted this and done some googling, I went back, powered it on and the multi-meter showed a clear voltage, and it also measured amps well.
From Dave's videos on this unit I don't see a basic fuse inside - outside of the component he replaced which was rated at 5amps. And since the unit is sealed I cannot imagine I have to go inside to look for burned out fuses.
Anyway - for my use, this was not a typical load so I'm not worried. I cannot imagine the noise you have from it running it at that high a load. I thought my computers were noisy until I heard the fans in this thing start up