How to upgrade the memory in the Satellite L75-B7270

Question

I recently purchased this laptop for my son for his school work. It onlyt came with 4GB of memory and says it is upgradable to 16GB of memory. However, I do not know where to install it! This paricular laptop has a smooth bottom except for the battery, There is no secondary cover that I have usually seen on laptops to add/change the memory. So I am assuming that I need to remove(?) some of the screws and take the bottom off?!? If so, which screws? I can find no information anywhere, not even Toshiba support.
Please help!
TIA
Mike
Solved!
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Answer 1

This laptop is a royal pain in the a$$ to open up (at least the first time).
1. Remove the battery.
2. Identify the retaining screw of the DVD drive. With the laptop facing down, identify the side of the laptop where the DVD drive is located.  The screw in question is a few inches inward (toward the center of the laptop) from that location, where unlike the other screws around it (which are embedded inside of holes), this screw is almost flush w/ the laptop cover (hardly recessed).  Once you find it, remove this screw. The DVD drive should then be able to be pulled out (with minial force). Save this screw (and the DVD drive) off to the side separate from the other screws (as this might be one of two screws which are different than the other screws holding the laptop cover).
3. After removing the DVD drive, locate the WIDE HEADED FLAT (but very short) screw underneath the opening of the the DVD.  (It's obvious to locate/identify this screw).  Remove this screw as well, save it off to the side (separate from the other screws).
4. Remove EVERY SINGLE other screw you find visible from the laptop cover (there's around 16-18 screws IN TOTAL, including the ones above).  As far as I can tell, all remaining screws are of the same size & type.  Note: Be sure not to miss the screws immediately to the LEFT & RIGHT of the battery compartment  (although no screws are inside the compartment itself.  Also, don't remove the electrical tape in that compartment -- it has no bearing on being able to open up the laptop).
5. Now comes the "fun" (tough) part: prying the bottom cover off of the laptop base.  Try lifting up on the DVD drive opening (putting your fingers inside the drive opening and lifting UP).  Hopefully you'll see part of the laptop cover start to separate from the base.  If you do, place something underneath that separated area (a thin piece of plastic, like a credit card).  If that doesn't separate the cover from the laptop, use your fingernails to find a spot SOMEWHERE on the laptop where you can begin to separate the cover from the base.
6. From that separated area, work your way around the entire bottom of the laptop, prying apart the cover. Unfortunately, this requires using some force as it's clipped in VERY tightly.  Pulling (with your fingers) does work, but it could just as easily break some of the clips, so do this at your own risk. (Don't go overboard w/ the amount of force you use). 
Note: Try and guage the amount of force needed to start separating the cover from the base.  If you fail to remove some screws, and that approximate level of force fails to separate the cover, you may have failed to remove a screw in that area.  Check carefully for screw holes you may have missed the first time around.
7. Once you've pried apart the cover, the rest of the process is trivial (for RAM replacement).  The pair of RAM sockets are easily exposed & accessible (there's one 4gb chip installed, the 2nd socket is free).  If you want to upgrade to 8gb or 12gb, you need only populate the 2nd socket w/ a 4gb or 8gb chip respectively.  If you want to upgrade to 16gb of RAM, you'll need to remove the 4gb chip and install 8gb chips in both sockets.
BONUS: The HARD DRIVE is installed using a flexible style frame, but it's wedged in tightly w/ rubber stoppers (which are part of the flexi-frame), making its removal difficult to figure out.  At the TOP, LONG EDGE of the hard drive (the edge that's towards the laptop's interior, not the edge close to laptop's side wall) there's a rubber grip (maybe 1.5 inches long) barely sticking up.  Grab that grip and PULL UP.  The hard drive should start to come up, at which point you can grab it and pull it out of the SATA socket.
Before pulling out the HD, pay attention to the orientation of the rubber stoppers at the bottom end of the HD (the end opposite the SATA interface).  When you pull out the HD, the stoppers will come out as well (but since they're attached to the flexi-frame, they won't get lost).
To remove the HD from the flexi-frame, simply pull the sides of the frame from the HD (it shouldn't take too much time to figure this one out). The frame doesn't use screws. It has attached pins that go inside the screw holes located on the sides of the HD.
Re-assembly:
a. Place the the laptop cover back onto the laptop base.  Push down.
b. Go around the entire edge of the laptop, pushing down w/ your fingers to re-apply all of the clips.
c. Screw in the wide/short flat screw of the optical drive compartment (from STEP #3)
d. Slide in the optical drive.  Secure it w/ the screw removed in STEP #2.  (When the optical drive is not installed, this screw-hold doesn't have any threads to "catch" the screw).
e. Screw in all remaining screws
P.S. If you have to re-open the laptop, it's far less daunting to pry it apart the second time around (as the clips aren't as tight anymore).