Morino Tamagotch screen keeps fading out during battery replacement

Heya,new to tamagotchi.

Found a morino tamagotch in a thrift store

But it wasn't working so i replaced the very old batteries with semi old ones.

It kinda worked until the batteries ran out

Though i noticed that theres something wrong

Like,it turns off and on with a light slap

So it means egg after egg after egg

Then i bought some new ones but while screwing it on to close the screen fades to nothing

But when the lid isnt fully closed,it works just fine.though that'd make it hard to put in a bag or my pocket

Also works without the lid except everytime the batteries move it turns off then on again.

The screen fades away because as soon as you open the lid which keep pressing on the batteries to keep them connected it will turn off. That is normal for a vintage Tamagotchi.

Not sure why when the lid is closed your Morino won’t work   but I recommend you try this method that @Penguin-keeper suggested to me in another topic and see if it works!  

Did you ever get the Tamagotchi working properly? I adore thrifting so I kinda really wanna see your thrifted find