How to: Install or replace SRAM Cache Memory chip.
Solution:
NOTE: This task should be done by a qualified computer technician.
Replace the SRAM Cache Memory chip(s) by removing the computer cover, locating and removing the old chip(s) and installing the new chip(s). Power up the system, watch the POST memory test, and update the BIOS.
WARNING: Electrical shock hazard! Make sure the power is turned off and the external power cables have been disconnected before removing the computer cover.
CAUTION 1: This task should be performed by a qualified computer technician.
CAUTION 2: Please observe steps to reduce the potential damage to computer components from electrostatic discharge.
NOTE: You must have your computer's user manual to complete the following steps.
1) Remove the computer cover.
2) Read the owner's manual, and inspect the motherboard to make sure that SRAM Cache Memory chip is the type of chip you have installed.
3) Determine the amount of memory you wish to install or replace.
NOTE: Sometimes memory must be added in specific increments in order to fill an entire memory bank (e.g., 2MB, 4MB or 8MB, depending on the memory type). This information should be available in the owner's manual.
4) Determine the speed of the existing memory, and make sure the speed of the new SRAM Cache Memory chip(s) match.
NOTE: If removing an old SRAM Cache Memory is not required, skip to step 6) for installation steps.
5) To remove old SRAM Cache Memory chip(s):
a) Touch the chassis to discharge any static.
b) Remove the old SRAM Cache Memory by using a chip puller. Grasp the edges firmly between the tips of the tweezers, and pull straight up (rocking gently back and forth if necessary).
c) Place the SRAM Cache Memory chip in an anti-static envelope
CAUTION: Do not mix up with new and old SRAM Cache Memory chips.
d) Repeat steps 5)a) through 5)c) to remove additional SRAM Cache Memory chip(s).
6) Install the new SRAM Cache Memory chip(s):
a) Locate the appropriate cache chip socket on the motherboard.
b) Touch the chassis to discharge static electricity.
c) Install the new SRAM Cache Memory chip by aligning its pins with socket, and pressing down firmly until seated.
CAUTION: Be careful not to bend or damage delicate pins on the SRAM Cache Memory chip, or damage the motherboard chip socket.
d) Repeat steps 6)a) through 6)c) to install additional SRAM Cache Memory chips.
e) Make sure all the SRAM Cache Memory chips are level and completely seated by again pressing down firmly on each chip.
7) Test the computer to see if the new memory is recognized and functioning properly:
a) Make sure no parts or tools remain in chassis.
b) Replace the necessary cables (power, keyboard, video) and plug in the power cable.
c) Power up the computer.
d) Carefully observe the MEMORY TEST portion of the POST. (It should report 1024KB of memory for each MB of memory installed. Some computers may be off by 384KB, depending on how they handle the last 384KB in the first MB of memory.)
NOTE: An error message reporting inconsistent memory may appear because of inconsistencies between the BIOS information and the actual memory found.
e) If all the installed memory is not reported, or the POST does not complete successfully:
1] Turn off the computer.
2] Unplug the power cable.
3] Touch the chassis to discharge any static electricity.
4] Recheck the SRAM Cache Memory chips to make sure they are properly seated. If necessary, remove and reinstall them using steps 5) and 6) above.
5] Repeat steps 7)a) through 7)e) to retry the memory test.
NOTE: Older BIOS may require the user to update the amount of memory manually.
8) Replace the computer cover.
9) Create a System Boot Diskette.
