Some additional waveforms: 500Mhz Peakdetect mode in the same 500\$\Omega\$ load. Various runs were done that showed the same basic waveforms but with varying peaks.
Channel 1: the highest peak
Channel 2: the longest train of transients
Channel 3: the quietest
At any rate, the transient train does not seem to extend for much more than 300ns, which is quite the improvement over previous reports in the hundreds of ms. From these waveforms, the worst case would be 34V applied during all 300ns on the specified load, which would yield a total energy fo 690nJ.
Other aspects that were mentioned by others: the PS still draws 10W (!) in standby and the backlight still seems to be turned on all the time (there is a faint glow on the screen).
Is the cooling fan still running like it was before?
I'm still puzzled by that vampire power draw. It's not like the thing has an OCXO in it. Does it boot faster from standby and, hence, needs 10W to keep it ready to turn on?
The cooling fan runs all the time.