the following procedure should work for all receivers which might have problems with the EOW rollover:
1) Turn on your receiver.
2) Place it into AUTOLOCATE MODE. Note: No other mode will do. Select a country won't do.
3) Place the GPS in an outdoor location where it has a full sky view.
4) Within an hour it should get 3D lock.
5) Leave it outside for as long as possible up to about 12 hours so it can collect ephemeris data from all of the SVs. (If you stop in the middle, it is OK, but the GPS will have to collect the other data later which is just fine too

Using the master clear is RISKY. Crystal oscillators drift over time. The GPS receiver retains the oscillator information so that it can acquire when it is turned on. If this information is cleared it could take much longer to acquire in the first place.

In all of my conversations, I am recommending that the customer with a GPS 55 perform the master clear
sequence.   We never recommend master clearing a GPS 38, 40, 45, 45XL, 89, 90, or 120.  However, the GPS 50, 55, 65, 75, 95, and 100 will generally operate normally after a master clear (Power ON while HOLDING CLR).

Basically,  there are three EOW recovery options people should consider with these older model GPS receivers:

Switch-on while holding the PAGE key, this will need to be done any time you switch the unit on until the 20th September. This method does not affect your user data.

Download and use application available from our website that resets the date in the GPS.   This method does not effect your user data.

Switch-on while holding the MARK key, this performs a master reset and re-enter an initial position then leave it receive. This only needs to be done once, but deletes all user data.

The GPS can take 30 to 45 minutes to acquire after any of these methods.

Garmin Engineering Department