I bought this unit last April at Abenson Appliances here in Bohol Philippines. It was okay, performance no question, but yesterday as I opened it, I noticed a white dot in the lower right of the screen, about half an inch above the taskbar. How can I fix it? Is this under warranty? It's really annoying me. Can you give me solutions of there's any to fix it? I researched already in Google, but I'm afraid it will just worsen the problem. Thank you!