Grass Valley Trinix Back-Up Power Supplies Jan 13 2012 - Manual (Page 39)

Trinix — Installation and Service Manual 39
Reference
Page 5 of the the Linage manual, in the "hot Plug" section states:
When rapidly extracting and reinserting modules care should be taken to
allow for discharging the internal bias supply so that a predictable restart
could be achieved. The way to ensure that the circuit sufficiently discharges
is to observe the spinning of the fans after an extraction. The unit should
not be reinserted until the fans stop spinning.
Regarding hot-plug issues, it is possible to essentially lock up the processor
during re-insertion if the Vcc of the processor is still decaying as the power
supply is plugged in. That is why we request on the data sheet to refrain
from re-inserting the supply until the fan stops spinning. This is a known
issue that only occurs during a rapid reinsertion. No physical damage
occurs, but a re-insertion is necessary.