How to fix my iphone?

My iphone has been dropped from table and after that its not starting up. If I connect it to charger only apple logo appears and gets stuck there. Sometimes the logo disappears with a red screen. This phone is out of apple service and I took it to a local mechanic. He said its a software problem but he couldn't... show more My iphone has been dropped from table and after that its not starting up. If I connect it to charger only apple logo appears and gets stuck there. Sometimes the logo disappears with a red screen. This phone is out of apple service and I took it to a local mechanic. He said its a software problem but he couldn't fix it either. I tried hard reset but it didn't work. How can I fix this phone?
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