Construction: Upgrading and Maintenance
The T43 follows the same user accessible layout as the R52. Removing the single bottom access pale gives way to reveal the unpopulated DDR2 SODIMM memory bank. The sample we have here came populated with 1 x Samsung 512MB DDR2 533/PC4200. The hard drive uses a secure swing design, so you can only remove the hard drive by swing the enclosure door open. As we mentioned with the R series, the display lid cannot be closed when you remove the hard drive, other wise you are going to damage the casing.
Like the previous IBM designs, you can easily access the keyboard by first unscrewing the four keyboard screws marked by the "keyboard icon" on the bottom of the notebook. Since the keyboard uses an simple interlocking mechanism to hold it in place, you just need to nudge the keyboard forward away from the touchpad and lift it out with a flat-head screwdriver. You can also do this with your fingers if you are careful or carefully hold the notebook upside down and unsecure the keyboard. The keyboard connector should just pop out on its own.
Under the keyboard, you can see the second DDR2 SODIMM slot, CPU/GPU cooler atop CPU/GPU, and the 915PM Northbridge. You won't be able to remove the CPU cooler for cleaning unless you unhook the front half of the upper casing (the wrist rest portion of the case).