Half dead LCD - Casio G-Shock G7000D-8V Wrist Watch

well you obviously reassembled it wrong. I would suggest a professional gunsmith and let him show you what mistake you made. It's the safest thing you can do with a deadly object. please use your head here

These babies are notorious for going down the tubes with a battery change. I bet if you get it back it won't work with a new battery. Twice I have replaced batteries and the watch didn't work when I finished. One of them was my own watch, I think $450 is about half the price of a new watch and that is sad. Cool watch just not very long life

On the back of the watch, press the "A" button. Then the top half of the LCD will flash the current "month" setting. Press the "M" button to change the month by 1 month. Press the "M" button until you have the current month.
Then press the "A" button again to change to the watches current date settings. The bottom half of the LCD will flash the current "date" that the watch has been set to. Press the "M" button until you have the current date.
After that, press the "A" button again to select the current hour. Press "M" to select the hour, and when you have the current hour, press the "A" button one more time to select the current minute. Press "M" until you get to the current minute. Once you have the current minute set, press the "A" button again to finalize everything, and your finished!

I am assuming you have a lithium battery and they test good at 3. Since they can die off slowly i would replace it as it may not have enough to power your watch. These will typically need to be replaced about every two years or so.

This as with most fashion brand watches has to be ordered through the manufacturer. Contact the manufacturer direct or see a retailer for instructions.

what phone?

1
ensure all three of the springs are present
the 2 at the top confirm that the case is closed the on at the bottom sends the sound signal.

2
ensure the metal casing on the back of the movement is not touching the back. and check the movement is correctly seated

thats is normal you can get them changed usually on market stalls. for a few quid. watch them they might swap it for a fake. only kidding.

Assuming she can live without the alarm functions, have you considered the quick and dirty option of swapping the original clock for a quartz movement?

the problem of your watch is circuit block,or lcd liquid crystal digit,try to replace the circuit or lcd,