Installing memory on an Acer 3680 Laptop
The acer 3680 has two memory slots that takes DDR2-533/PC4200 or DDR2-667/PC5300. Because the Celeron M has a FSB of 533 Mhz, you’re limited to 533 Mhz even if you use DDR2-667. The computer typically come with a single 512 Mb module and can accept up to a maximum of two 1 Gb module for a total of 2 Gb. Since DDR2-667 and DDR2-533 are pretty much the same price these days, I chose a pair of G. Skill 2 x 1 Gb DDR2-667 from Newegg.
To install the memory, power off the laptop and remove the battery. Turn the laptop over. The memory module is located under the middle panel, the one with the Windows Product Key sticker. To remove the panel, remove the two screw on the bottom of the case. There is plastic washer underneath the panel holding the screw in. You will have to unscrew the screw all the way and then carefully use your fingernail to pry off the screw (be careful not to lose it).
Once you remove the screw, you will find resistance as you try to pry over the panel. The panel is actually being held in by plastic fingers that stick out to the back of the panel and some to the side. Pry open the cover gently so you don’t break the fingers. In my opinion, it’s a really bad design, since plastic get brittle with age and the fingers may break if you keep opening the panel.
After you remove the panel, you’ll notice 2 white plastic washers. Carefully remove them so they don’t get lost.
The memory module is toward the back. Examine the memory module carefully, you’ll notice that the memory module is being held by two clips. The clip fits into a notch on the side of the memory. Gently pry the arms of the clip outward, causing the memory module to flip up to about an 45 degrees angle. Remove the memory. Insert the new memory at an 45 degree angle and swivel the memory gently until it clicks into the clips. Since there is a notch on the connector, you cannot insert the memory in the wrong direction. Do not force the memory or you will break something.
Once the memory module is in, don’t close the memory door right away. Test it to make sure it works first. If you don’t get a BIOS welcome screen, then the memory is not installed properly. If you get a blank screen, don’t panic. Turn off the machine, remove the battery, and re-seat the memory. I find that I may have to re-seat the memory a few times before the memory works. If it still doesn’t work, try different combination of the memory module. You may have a bad memory module. Trying different combination allow you to discover which one.
Once everything is working, turn the laptop over again. Carefully put in the white washers on the screw hole. Reattach the memory panel door starting with the fingers in the back. Be careful you do not knock off the white washers. Once the panel is click in place, put the two screws back in.
Post Installation Booting Problems
After installing the RAM, I notice that occassionally, was unable to start up after a shutdown. Typically, I would turn on the machine. The power light would be on, but nothing happens. The problem is usually fixed by removing the battery and AC, killing all power to the laptop. After the power is restore, the laptop boots normally, only to have a similar problem again after shutdown.
After some research on the net, the problem is cause by a BIOS timing issue. According to Acer, the problem affects laptop with dual RAM. To fix the problem, download the BIOS 1.3505 or above (mines was originally 1.3502).