As soon as the unit is powered on the GPS turns on regardless of antenna position. Is there a way to turn off the GPS on the circuit board. I cannot turn it off using the screen because it is stuck in an on / off loop at power up...which I found out how to resolve but can't with the GPS on. I have opened the unit removed the circuit board and removed the single wire connecting to the flip up antenna and that does not turn off the GPS. What am I missing?
I had the same problem. I pried open the antenna cover about half an inch. Tapped the dislodged magnet out. The quarter inch magnet is fitted into a small oval rubber piece with two small holes one at each end. The rubber piece and the magnet can be reposition back to the two pins close to the edge of the antenna cover.
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Sounds like an antenna problem. Some units have internal antennas and some have external ones that plug into the unit with a small cable. The unit thinks you are still inside and cannot find a satellite to lock on to.
I'd suggest calling Lowrance.. Those guys are very helpful with step by step support... I just purchased a used boat with a 525c df on it and been troubleshooting some problems with it. Central time zone and best to call right when they open or turn on the phones at 8:15.
This may help. Mine has the GPS antenna build into the bracket at the back. I removed the bracket and the unit did not go into the error screen and the sounder worked fine. The GPS would not locate but it has not antenna attached so DOH!! I have orderd a new antenna with the BNC connector and will post if that fixes the problem. At this point I'm guessing its a blow GPS antenna.
mine does the same thing....i even have the external add on antenna, mine turns on fine but as soon as you flip the antenna up on the back, the screen starts flashing and the system keeps rebooting over and over again...
had same problem with lms337. i had upgraded the unit but had not upgraded the lms2000 gps module. i was turning the isolator on in the boat which powers up gps module, if the lms337 is not powered up as well the gps unit goes to sleep. the upgrade fixes it by checking that the unit has not been turned on periodically. otherwise as soon as you power up gps module also turn on lms337. lowrance product support sorted this for me.
I have a similar problem but I can't turn the GPS off at all, even when the antenna is down. As far as the power on/off cycle, I found another link on this site that said to turn off WAAS while the GPS is off then when you turn it on the unit will not power cycle continuously. You loose the WAAS feature but the GPS and unit still works.
Remove the Antenna while in the upright position, clean connection and replace. Set the GPS current position. Then initialize the GPS. Select Yes and leave the unit alone for 20 minutes. Do not press anything else. The initialization runs in the background. make sure you have a clean line of sight to the sky. Then turn the unit off and back on. You should be OK.