screen shuts off and won't comeback on

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http://androidforums.com – So, the glass cracked and I replaced it myself. IT seemed like a success, because it booted up fine and was working perfectly. HOwever I quickly noticed that when the screen timed out or is shut off manually , the phone remains on but the screen is off. Hence, it will ring but I see nothing on the screen. Only way to get the screen back on is to open remove battery, turn back on. Help please! (General)