Good watch Dave, just as MK14 has said the broken bezel on the front panel is a big red flag that it's taken a substantial knock.
As much I enjoyed the diagnostics so often faults are easy to find with close inspection. A
I did do that, just not well enough, I missed it the first time. Oh well.
I did have some help though.
I need to get the first "inch" or so of the youtube progress bar, video loaded, so that I can reliably and smoothly watch it in full 1024 HD resolution.
While I was doing that, I was watching the first 30 seconds (approx) two or more times.
So with Dave very early on saying something like, "Watch out viewers, see if you can spot the fault".
So I was pre-warned that it is likely to be observable on the PCB.
I saw a brief image, where I could apparently see crack(s) in the PCB, near the rotary controls.
The cases (HP) are usually rather well built. So it probably would have taken quite a knocking (or drop), to get the damage to the case.
I thought that Dave did very well repairing it.