Screen won't change

SOURCE: Lms 520c 5" Screen Color External Gps And 200 Khz Sonar System: I have a Lowrance LMS 520C on my boat. The GPS wi...

I have the same problem on my 520C.
I have no solution but I hope you have find some?
Best regards
Dan

SOURCE: The sonar component occasionally looses

First of all, here is the main ONLINE SUPPORT page for your model :

http://www.lowrance.com/Products/Marine/Large-Screen-SonarGPS-Chartplotter-Combos/LCX-25C/

And here is a direct link to the ONLINE USER"S MANUAL for that model:

http://www.lowrance.com/upload/Lowrance/Documents/Manuals/LCX-110C_LCX111CHD_LCX-25C_LCX-26CHD0151-311_030705.pdf

To view the Support Page or the Owner's Manual with Operating Instructions just use your mouse to click on the link, which is the underlined and highlighted text just above. This will open a new web browser page automatically for you and allow you to view the information at the website indicated or the icontents of the Ownwer's Manual.

You may need ADOBE READER installed on your computer to read PDF documents.
You can download this free at WWW.ADOBE.COM if necessary.
Click on the DOWNLOAD ADOBE READER button on right side of the ADOBE home page when you get there.

See page 12 of the ONLINE USER'S MANUAL for detailed instructions on what angle you should set your transducer in order to prevent losing track of the bottom at high speeds.

Please comment back here to this page if you have questions or require further assistance and I will respond as soon as I see it.

If this was at all helpful please click on the 4 Thumbs Up helpfulness rating icon you see on this page.

Good luck and thank you very much.

Joe.