Hi, just today my 3597LM was kind of dim so I checked the settings and the brightness was set at 20%. I went into settings a put it back up to 80%, backed out and about 15secs later it dropped to 20% again. Repeated this several times. Did a hard power cycle same thing.
Not useful in bright sunlight!. I've had more issues with this unit since I got it last month...I will post those later but I need to find a solution to this problem since I am traveling in Ireland for the next week and need a fully functional GPS.
Thanks,
Tony