Samsung Galaxy S (I9100g) won't turn on or charge!

So the other day I was using my phone (normal usage) and suddenly while using Whatsapp, the phone froze and wasn't responding at all. Finding no other way to use it or turn it off, I proceeded by pulling out the battery and ever since it has not booted back up or even charges. The only sign of life I get is the momentary sound my laptop makes when I connect the phone via the data cable but that too also lasts for merely a second and the disconnects again, it keeps on connecting and disconnecting. Any help at all would be grateful!
P.S I even removed the battery for a couple of hours, left it to charge overnight, all to no avail.