P H 4 4 0 N L X M o t h e r b o a r d U s e r G u i d e
UPGRADING THE MOTHERBOARD
Care must be taken in the purchase of upgrade parts to ensure both compatibility with the
system and the compliance with appropriate approvals and certification, e.g. CE marking
within Europe. Using non-approved parts may invalidate your warranty and system approvals.
Upgrading the motherboard is not difficult, but if you do not feel confident about the work
involved, you may wish to have your supplier or service organisation complete it for you.
Never carry out any work inside the computer with AC power applied. Turn off the computer
and unplug all power cords before starting work.
ADDING MORE MEMORY
The motherboard has three DIMM (Dual Inline Memory Module) sockets, each of which accepts
DIMMs of up to 128 Mbytes, in any combination. The slot furthest from the processor (MM1)
should be used first.
The memory modules should meet the PC100 specification.
Fitting and removing DIMMs
Read all of these instructions through carefully before you start work.
Turn off the computer and unplug all power cords. Take suitable anti-static precautions and
remove the system cover. Leave the DIMM in the antistatic packaging until the last possible
moment and when you do take the DIMM out of its packaging, hold it by its ends and avoid
touching the metal contacts.
Follow the diagrams and simple instructions on the following pages to insert each DIMM.
After you have fitted new modules, check that the system recognises all the memory. If not,
check that you have:
Correctly fitted the DIMMs in their slots.
Installed DIMMs of the correct type.
It may be necessary to refit the original memory to check if there is a problem with your new
MITSUBISHI ELECTRIC MOTHERBOARD DIVISION
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