Hi guys. I'm new here. I've just updated my Samsung Galaxy Ace to 2.3.4 everything seems okay besides the language thingy but I can't power on my phone without a power supply plugged in. Is there any problem or I had done any wrong method in updating my phone? Is it better that I downgrade the phone back to 2.1? Thanks in advance. FYI, I got my update guide from this link sleetherz