Left select key problem

[Tõnis]

The action on the left select key (touch pad) of the 3000N100 isn't so good anymore. It's kind of "lazy" to spring back if it's depressed on its left side. The middle of the key is still clicking well enough, but it seems a bit weaker, too. Is this a user serviceable part I could order? Is it a job I could handle? My level of repair abilities is as follows: I successfully changed the fan and CMOS battery on my R61, but I wouldn't attempt a backlight replacement (or something similar) for lack of soldering skills. TIA.

Tony