mgtf85

I have owned a MG TF 85th anniversary car for a couple of years now, but due to covid have done quite a few mods, cruise control etc. but not much driving. My question is when the ignition is turned on should the instrument panel light up completely? There appears to be a light behind the centre section of the panel showing temperature etc. and all the warning lights come on and go out as they should do when the car is started but should the speedo and tachometer be lit all the time with the ignition on? The only way I can get the speedo and tachometer to light up is to turn the side/main lights on. Is this as it should be or should the whole instrument panel be lit in normal running?

Rod