[Q] Power button faulty only when device is on
I appear to have trouble with my device's power button. I have a Pantech Sky Vega Racer 2 A830S which I took out of the box after a month in storage. It seemed okay the first few hours, but I started to notice that I could NOT put the phone into sleep when pressing on the power button once. It works like 1/10 presses. Sometimes, it even seems to do an extended hold even after just pressing once since the "power off, restart and sound profiles" popup appears.
Thankfully, the power button isn't doesn't seem to have a problem when the phone is off. When the phone is off, I can turn on the phone 100% of the time. Heck, when I remove the battery for a few minutes and turn on the phone again, the power button functions perfectly and I can sleep and wake with just a single press, no matter how fast I do it. Half an hour later it starts going haywire again. It appears this problem is truly isolated to when the phone is turned on. What could the problem be? It doesn't appear to be the physical power button mechanism. Could it be the battery or something power related shorting the buttons or something? The problem seems to be electrical in nature and I'm at the end of my wits here.
Any advice is appreciated. Thanks in advance.