If the original sketch worked, then failed, then trying lots of other sketches would to be no avail, since the original sketch will not have 'changed' or gone faulty on its own.
So what was the original working sketch, post the code ?
the program asks to check the wires. I have checked everything 10 times, there can be no error here.
The problem, as described, sounds mostly like a hardware or wiring failure.
Always a good idea to mention which Arduino you are using ......