Lenovo T420 - Manual (Page 83)

1090 DIMM (in the slot under the keyboard)
For access, remove these FRUs in order:
•
“1010 Battery pack” on page 63
• “1050 DIMM slot cover” on page 69
• “1080 Keyboard” on page 73
Note: Your computer has two DIMM slots: one under the keyboard and another on the underside of the
computer. If you install a DIMM in only one of the two slots, install it in the slot located under the keyboard.
Removal steps of DIMM (in the slot under the keyboard)
Chapter 8 . Removing and replacing a FRU 77