Guys, before any dangerous or irreversible operation, remember to try to remove ONLY the battery for few minutes! In my case it worked, I think there is some integrated protection to protect the fuse.
Well, I'll try the contact cleaner! The last time on an Alcatel one touch I used the olive oil and it worked a bit slowly but very well. Now it smells like salad but it's ok.
Be careful on the bottom side of the screen, if it's not broken you're going to damage the ribbon and circuits on the bottom with the pick if you push too much. Also you have to go in 2-3 cm to remove the back cover towards the cameras due to the extra adhesives on the sides of the camera glass.
