After I changed the batteries for my Disto A6 the screen stayed blank. I see the laser beam and beep. but nothing in the screen.

first off it is not a computer at all why post this thing to computers? let it sit for 24hours,batteries removed.l .
use fresh Type AA 1.5 V. batteries and see it work
never not try new batteries on any battery device that acts oddly.
you paid $600 for this thing , OMG too much.
worth $100 + $500 name Leica
Leica L Leica Disto D510 (E7500i) 650ft/200m Laser Distance Measurer w/ Bluetooth and Disto Sketch App for iPhone/iPad - Red/Black

Put in new batteries, clean lens, and calibrate. If this does not work, type " Leica Disto A6 Laser Distance Meter user manual " into computer search engine. It will bring up sites for manual.

Remove old batteries, put in new batteries, clean off lens.

Put in new batteries and clean lens and calibrate.

Low battery. Mine does that when batteries are too low to operate the laser.

Put in new batteries and clean lens and calibrate if it has that function. If that doesn't work, Type the " Leica Disto A6 Laser Distance Meter user manual" and it will bring up sites to manual.

all you need to do is unscrew the disto at the bottom remove it from the case and push the band (wires) that connect the screen to the unit. I had the same problem and just fixed it.

I heard of a guy in Houston, TX that will replace them, but I searched the internet and couldn't fine any info. I'd try where you bought it for advise. Maybe the factory is your only solution. good luck!

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can not measure distance.
each time the button is pressed dist, 279 error appears.