Sony PCG-K315B Hardware Manual page 26

n N
26
Using your VAIO computer
Space bar key, left Shift key
If any key top other than the above keys falls off, see the figure below to place it back into position.
To replace a key top
Hook the catches (1) on the key top onto the screen side corners of the key top support (2), place the key top back into position,
and then press it from above (3) until it clicks.
!
Do not take off the key top intentionally, as it may cause a malfunction.
Do not push the key top excessively when you replace it, as it may cause a malfunction. Handle the key tops with care.