Confirmed with shadow, the GPS module is not same as previous version, so the firmware for GT550WS/GT680W/RX300 is different.
Below FW is only for the version with NEW GPS module.
GT550WS FW:https://dl.dropboxusercontent.com/u/22493212/firmware/gt550ws_new/gt550w_english_V2.6GE_STD.7z
GT680W FW:https://dl.dropboxusercontent.com/u...80w/GT680W_FW_20140428_for_New_GPS_Module.zip
RX300 FW:https://dl.dropboxusercontent.com/u/22493212/firmware/rx300_new/RX300_english_V2.5GE_STD.7z
GPS PLAYER TOOL:https://dl.dropboxusercontent.com/u/22493212/firmware/gt680w/PlayerSetup_Google_ShadowPlayer.zip
Sorry, I don't know about this, hope someone can give an answer.Billknow, regarding the Shadow "GPS"-receivers. Is this a Navstar-GPS only receiver, or a GNSS receiver?
by the way, my version is silver gt680w.
I have same problem.no gps signal. all the time gps icon is flashing, with or without gps antenna connected !
billnick - Please post the link for V3.5. I just purchased my second all black GT680W via E-Prance on Amazon that has FW V3.5. My "spare" gps module purchased one year ago due to a hiccup works on the first unit with FW V2.7, but does not work with the new unit. I'm going to try V2.7, but I would like the file for V3.5 in case I need to return to the original firmware and purchase a compatible GPS. Thanks
I tried v2.3 and it doesnt work. (my old version v2.5g)
the satellite symbol in the LCD display was blue when my version v2.5g but now this satellite symbol is yellow. And how can I turn my old version (v2.5g) or newer version?
thanks
I have same problem.no gps signal. all the time gps icon is flashing, with or without gps antenna connected !