Hi, Sorry this hasn't worked for you
The only optoins for you are...
So, I cannot offer a resolution to this problem, sorry..
We have tried the updates on-line, and the settings on the Garmin too.
I am stuck from here,
The night time display is ok to run permanently, the Garmin will not be affected by this,
If you can see it, you might aswel use it that way,
I cannot suggest anything that would brighten up the display for you.
Move it closer to you maybe on the dash, turn it so it gets some light from the daylight,
Sorry I am stabbing in the dark really, but the settings cannot change on the device.