Sostituzione memoria MITAC 8640
Created By: gnazzino70
Last Modified: 12/17/06
Summary: A jetpak created on Sun, 17 Dec 2006 14:24:01 GMTMITAC memoria
Motherboard Revisions
To
find your laptops driver files and BIOS support files there should be
letter codes (in parentheses) on the right side of the lower case main
label. (Including on the WinBook M series) Letter Codes are - 8640,
8640 P4-M4, 8640C, 8640D4_G4, 8640DGMP, 8640DH/GH, 8640HC, 8640L/S,
8640SC and 8640SH. However, Mitac's service manual calls out the
following 8640 sub-models. I'm not sure how each of the above revisions
compare to the following motherboards. I have little concrete data on
the differences with each revision of the 8640 laptop, but I will be
adding more as soon as people help me fill in any missing information.
8640i (Silver)
Desktop CPU's Willimette or Northwood plus Celerons from these families of P4 CPU's. Video memory up to 64MB of shared memory.
8440D (Gold)
Desktop CPU's Willimette or Northwood plus Celerons from these families of P4 CPU's. Video memory 32MB of embedded DDR memory.
8440G (Platium)
Mobile
Willimette or Mobile Northwood CPU's plus Celerons from these mobile
families of P4 CPU's. Video memory 32MB of embedded DDR memory.
8440N (Caiman)
Desktop CPU's Willimette or Northwood plus Celerons from these families of P4 CPU's. Video memory 32MB of embedded DDR memory.
The 3.06GHz/533 Hypertheading CPU was supported in desktop revisions.
Other Information
Memory
in all cases was DDR SODIMM modules and there are two slots for memory.
Maximun RAM is 1GB per Mitac - I will see if two 1GB modules will
function if I have time. Memory speed only needs to be PC2100 or
PC2700. The first module is located under the large plastic panel
on the bottom of the laptop. (Primary memory module) and the second
(secondary) module is located under the keyboard.
To
remove the keyboard or to install secondary memory, you need to remove
all power (AC and battery) first. Then push the status panel (Panel
with ON/OFF switch) to the left until the panel's latches are released
from the main case plastics. Lift the panel up and off. Then unscrew
the screws along the rear side of the keyboard. Then lift the keyboard
up until you can free the ribbon cable from the motherboard. The cable
is held in place with the standard friction latching connector that has
a small wedging locking bar that presses the ribbon cable against the
connectors contact. Pull the locking bar (light color part of the
connector) away from the main part of the connector until the ribbon is
loose. (about 1/8" or a few mm's)
The
8640 also has a mini-PCI slot for an optional wireless NIC card and it
too is located under the keyboard. Brands of wireless card is important
and I've had at least one brand fail to install correctly and so do not
assume that any old card can be installed -- even if the wireless
antenna is in place.
The
brand and model of the optical drive is very important since I have
been informed that Panasonic, QSI and Lite-On Combo or DVD-Burner
drives are the only brands known to function. Even with these brands
the drive must be set to Master. Most Combo CD-RW/DVD or DVD-Burner
drives do not have a selector switch for M/S and if the firmware is the
incorrect version you can not use the drive. Newer versions of the BIOS
do not solve this problem.
Many
older read-only CD-ROM drives do not seem to have a problem with M/S
setup and some DVD-ROM drives do have M/S/C Sel switches and most
likely be used if set for Master operation.
From: http://www.orphanlaptops.com/id263.htm
