casio prt 30 (1405) battery change?

i have put a new battery on my casio prt 30 (1405) the screen is blank, is there a function i have to do to make it work again ?
perry, February 2011


done
Even in 2020 that advice worked perfectly! Thank you.

Tom McGuire, June 2020
Guy...March 2016 is quite correct. Well done
& many thanks.

William

William, April 2016
You need to ground the battery by pressing one of the "prongs" that sit beneath the battery to the reverse or '+' side. Found it on another forum and it worked for me. I gently pushed the prong up with a cocktail stick and touched it to the + side then put the battery back in as jormal and it started to work.

Guy, March 2016
after installing the battery you have to touch 2 special places with a metal piece to get it going.

robert, November 2015
Any Casio has a reset button! Push after placing new battery.

FrankMUC, July 2014
I have the same problem... Anyone can help us?

Msrco, September 2012
link Click here to see other fixes for Casio.