Leupold GX-1 range finder has a new battery but optics are not all visible and Mode doesn't toggle. No damage to range finder known

Contact Leupold Support direct. We are Fixya, we aren't they and we can't give feedback on an issue like this unfortunately.

https://www.leupold.com/shop/rangefinders/series/rx

It may be a laser issue and needs calibration or repair.

https://www.bhphotovideo.com/c/product/1059069-REG/leupold_119360_rx_1200i_tbr_with_dna.html

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Replace the battery

Contact them direct

https://www.leupold.com/support/service/return-warranty-services

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Contact Support

https://www.leupold.com/support/service/return-warranty-services

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Leupold optics carry a lifetime warranty. Send it back b

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Leupold Product Service
14400 NW Greenbrier Parkway
Beaverton, OR 97006-5791 USA
by postal service:

Leupold Product Service
P.O. Box 688
Beaverton, OR 97075-0688 USA
Warranty/Repair
For product questions, consult the Leupold Web site at:
www.leupold.com, or call (503) 526-1400 or (800) LEUPOLD (538-7653).

Hmm, weatherproof must not mean the same as immersed. Above is where you can contact for repair.

Of hand, I would have you check to see if the sensor is covered by dust or dirt or condensation.

Maybe they are too far away

The RX series of range finders are not of the optic quality that other Leupold optics are. I have used my RX IV in place of my binoculars, but it is not adequate for glassing for game full time. The rangefinding abilities left a lot to be desired for me. As long a the object was under 450 yards, it worked fine. Past that was somewhat difficult to get a range at times. Hope this helps.