Hi to all the expert users here, need help urgently. I connected my SGS to my laptop and Kies started, indicating that a firmware upgrade is available. I went ahead and installed the upgrade, but now the phone won't turn on. Anyone has any idea what's going on? How can I resolve the issue? The phone's screen is black, but the menu and back arrow are lit. The phone will alternate between vibrating once and three times every few seconds. Any help is greatly appreciated. Thanks!

Anyway, I sent in my phone to Samsung for repair (Singapore site). It was done in an hour's time. I got my phone back now, but I would still like to know what to do if i repeat the same mistake in the future.