Respironics AUTO A-FLEX display illumination

Hello

Yesterday I bougth a second hand CPAP Phillips Respironics AUTO A-FLEX. It has just 94 hours of work.
All the menus are OK. The retro ilumination of rampa and Humidifier icon are also OK.

However, the menu display does not have illumination.
Somebody knows if this is a failiure or could be a configuration issue?

Thanks

If you would look on the bottom of the blower after taking water out and give us a REF# that would tell us which specific machine you have.

Nope, no screen illumination on those models. I guess they thought we wouldn't need to see the screen at night.

It's also damn hard to see the screen when there's light.