I recently updated the software to 6.810 on my 958c and installed I pilot link via the Ethernet port , everything tested out great and worked great with the boat in the garage .
When I got the boat outside in bright sunlight the screen display was very dim and hard to see . I checked the backlight setting and it was on the highest setting (10) I rechecked everything several times without improvement . So I decided to send the unit in for repair , I also noted that there was a second problem : the far right card slot would not take a memory card , not really a big problem , cause the left slot worked fine .
I received my 958c back today and the invoice Tech comments : card reader repaired , No issues found with display , Brightness of this unit is normal . Total amount charged including shipping = $289.45
I went immediately and tried it on my boat today both in the garage and outside in the bright sunlight . The brightness setting is on the highest (10) . While viewing inside the garage brightness is OK , but when the boat is outdoors under the bright sunlight sky the screen is too dim and very hard to read , almost useless on sunny days . This unit always worked well before this season , I never had trouble with seeing the screen in bright sun .
I know for a fact that the brightness setting feature is not increasing brightness after setting 7 . Settings 8 , 9, & 10 do not increase the level of brightness above the 7 level . I know that testing this unit indoors under artificial lighting or in moderate to low level daylight is deceiving and would lead someone to think it is working properly because you can see it fine indoors in artificial light.
I mounted the 958c next to my 998 to compare the brightness , took the boat out into the bright sun , and set both units on the same exact chart view , and set both to a brightness setting of 10 . There is a huge difference in the brightness , The 998 is very bright and easy to see and the 958c is dim and barley useable . I have also taken digital photos of this comparison that I can email to you if you want to compare them.
I really considered the brightness issue the primary fault with this unit , as I could have gotten by with one card slot . If the brightness cannot be repaired , I certainly would not want to pay almost $300.00 to fix a card slot on a unit that I can't see the view on sunny days .
Please let me know why the brightness level will not increase after setting 7 . I tested it several times in darkness & sunlight & settings 8 , 9, & 10 are not any brighter than 7 . This cant be normal /
ANY HELP Would be Appreciated