IBM LCD PC - Manual (Page 24)

I n d u s t r i a l P a n e l P C s O n y x - 1 5 8 / S
Onyx-158/S Series User Manual V1.2 24
Safety precautions
Warning! Always completely disconnect the power cord from
your chassis whenever you are working on it. Do not
make connections while the power is on because
sensitive electronic components can be damaged by
the sudden rush of power. Only experienced
electronics personnel should open the PC chassis.
Caution! Always ground yourself to remove any static charge
before touching the CPU card. Modern electronic
devices are very sensitive to static electric charges.
Use a grounding wrist strap at all times. Place all
electronic components on a static-dissipative surface
or in a static-shielded bag when they are not in the
chassis.