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Problems when building a circuit on my breadboard

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What the heck?

Ok this probably will sound weird and stupid but I have no idea why this is happening.
Sometimes when building a circuit on my breadboard, let's say a simple PIC that blinks a LED, I apply power and it won't work but when my hand approaches the board to check the connections it starts working... move away, stops... move closer and it starts.

The breadboard is just a basic radio shack 2"x3". I supply power using a 5V usb wallwart. I've got a cap on my power pins to the PIC

What's going on?
 

What the heck?

Hi,
Maybe some of your PIC input pins are left floating and that is causing some problem. All unused pins - make them output or pull them high or low with resistors.
Weird problem, although you could give my suggestion a try.
Tahmid.
 
Re: What the heck?

Possible...
check wire and codes again.
working on breadboard is not easy if circuit is big.
 

Re: What the heck?

hey connect the MCLR pin to +5v via 4.7k resistor, it gonna solve the problem
 

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