Hi Alex,
Here is the manual to help you http://zero88.com/manuals/7340300_jestermanual_3_4.pdf
However... there are three modes of operation for this desk:- `Program`, `Run` and `Preset`.
`Program` is used when you program the desk (with certain faders for certain lights).
`Run` is for running the show - here you can test all the programs that you have entered.
HOWEVER `Preset` is used to show all the lights attached to all the faders
`Preset` is the mode that you need to use so you can see which light is attached to which fader.
To help you, each operational mode (Program, Run and Preset) appear in slightly different colours on the screen. (If you have an attached monitor) ((Very useful if you do not have one))
`Program` has a background title of Red
`Run` has a background title of Green
and `Preset` is Orange.
To switch over from `program` and `run` mode you press the `mode` button.
To switch to `preset` mode you press the mode button for a couple of seconds. (If I remember rightly)
So, the first thing you need to do is to go into `preset` mode and test all the faders.
If everything works ok you will see each of your 42 lights dim and fade with your 48 faders.
(I am telling you this from memory - so i am sorry if i have got this slightly wrong)
(This will prove to you that all your lights work and which faders are for which lights)
If this doesn't happen then you need to check your hardware (cabling, dimmer packs etc)
If this does happen you now need to read the manual and learn how to program the desk.
I hope this is basic enough for you to understand.
If I have got anything wrong I am sorry (and I don't need flaming from anyone else - I am trying to help this guy)
Best of luck
Kind regards
(Please let us know how you get on)