GPS Nav question ....

I have been using a GPS Nav and L-Nav combination for a year or so, it
came with the glider I procured.

Yesterday I lost GPS reception from GPS Nav, first time this has
occurred. Wondering what I should try or look for.

- Unit is mounted on the shelf behind the pilot in a ASW-20
- nothing covering it
- Camelback bladder placed next to it
- Unit was re-calibrated last year
- new internal battery installed last year
- hardware version 38
- software version 5.1
- Cambridge Aero explorer plus says voltage of internal battery 3.0
volts
- glider battery was reading 12.8 volts at time of lost reception.
- SeeYou would not download file from the device, it hung up
- Cambridge Aero Explorer Plus was able to down load the file just
fine

The only thing different in the cockpit was that I mounted my SPOT
device on my left parachute strap around chest height.

I do not see any parameters that allow me to reset the logger or
delete logs from it.

Any ideas or thoughts?

Ron Gleason