If The New Ram Doesn't Work - Power Computing PowerCenter PRO User Manual

Adding Memory
3. Slide the contacts into the slot, starting with the end farthest from
the DIMM lever. Rock the module into the socket by pressing first on
the far end of the module and then the near end until the contacts
are firmly seated in the slot.
Don't force the DIMM module into the slot; if the motherboard starts
bending significantly, pull the DIMM out, reposition it, and try again.
Note: Some DIMM modules have sharp, square edges which are difficult to
get into the DIMM slot. If you have repeated difficulty getting the DIMM into
the slot, return it to your vendor for replacement.
4. If the DIMM module is seated, the DIMM lever should rise by itself so
it lines up with the other levers.
When you are finished, if your system is a Minitower, replace the base.
On all systems, replace the cover on the computer, replace and tighten the
thumb screw(s), and re-connect the external cables.
CAUTION: Be careful not to get any cables caught in the cover or the fan
housing when you put it back on the computer.

If the new RAM doesn't work

After you have put the system back together, if either the system doesn't work
or the new RAM doesn't show up when you click on A b o u t T h i s
Macintosh... under the Apple Menu, remove the cover and check each
module to make sure that it is firmly seated, and make sure you did not
accidentally disconnect any cables or loosen any cards.
If you are installing more than one memory module and they don't all show
up, try installing the modules one at a time and checking to see if they show
up in About This Macintosh... . If a particular module consistently fails to
show up, it may be defective or simply incompatible with your computer.
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PowerCenter Pro User's Guide
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