Garmin 178c won't find satellites - Garmin GPSMAP 178C Sounder GPS Receiver

try this for Garmin GPSMap 178C

Unable to acquire satellites with a GPSMAP 172/178
There could be a few causes of the device not acquiring satellites. If the device has moved a large distance since the last time it has acquired satellites or has been turned off for longer than a few weeks or months, the device may not be able to acquire the satellites correctly.
The first troubleshooting step is to perform an Auto Locate procedure. This procedure will clear the device's memory of previous satellite information, and try to download new information.
Note: This will not clear any user data like waypoints, routes, and tracks.
To perform the Auto Locate procedure, please follow these steps:

1. Start with the device powered OFF
2. Press and hold the Page button and Power ON the device
3. Continue to hold both the Page and Power button until the I Agree button is highlighted in the lower right corner of the screen
4. Press the Enter button

The device should now switch to the GPS satellite screen. Leave the device in clear view of the sky for at least 10-20 minutes to acquire satellites. If the device acquires the satellites before 20 minutes, the device can be used or powered off.
If the Auto Locate procedure does not correct the issue, the next step is to update the internal operating software of the device to the latest version. Please refer to the related FAQ for more information.

check your power connection, if that is still good your unit may be dying

can we download india map?if tell me how to download and install the map in my device Gm4300?

I need the screen replacement for GARMIN 178c

Backlight problem: Remove the display, remove the light tube from behind the LCD. Buy a led panel from Ebay for around $5 and install it behind the LCD under the drfusing layers. Run the wires out to a 12 VDC source and there you have it.

I dont thoink a bigger antenna is the solution because i'm having the same problem with my 178c and the built in antenna has always worked fine before.

I had the same problem with mine. It is caused by a crimped wire on the internal harness inside the machine. I opened it up and discovered that when originally put together 3 of the wires from the plug were crimped. One was broken off. The only way to fix it is to open it up, restrip the wires place a piece shrink wrap on before you solder it back and then make the shrink wrap flush with the back of the plug and heat her up. And, Voila... no more intermittent operation. Hope this helps? John

Contact Garmin and they will sell you one.

Hi

Sounds very much like the wiring plug connections in the back, always overlooked but so important that connections are tight and contacting.

Check the pins at the connector on the back of your unit. Make sure one of them is not bent or broken off. One of the pins on mine is missing about 1/16" of the tip. My boat repair shop says it's the power lead, but Garmin wants $200 for a generic repair.