[Closed] RockShox Revelation Dual Position not locking into lower position

Hi,

I have a 2012/3 ish Rockshox Revelation, which has been great. It is a Dual Position Solo Air model, so can adjust from 150mm to 120mm for climbing etc. had it from new about 1.5 yrs.

The forks change travel position by the following method: turn knob on left hand of fork crown to min travel, compress forks sub 100mm and there you have it.

That bit has stopped working. Service required? Not really bothered in sending it off to RockShox, if it is just a simple case of a a service being overdue 😥

Any tips?