I change the adapter and its cable and I made sure the charging slot was clean of any dust, then I pressed the power and home button for around 8 second, but I can't see the apple logo. I connected my phone to the computer, started itune (the latest version) and pressed again the start and home buttons to DFU my iphone, but nothing happens.
Restarted the computer, replugged my phone to another USB port, opened itune and tried to DFU the phone again, but nothing. All I see is a battery icon with a red thin line. I had the phone plugged for over an hour and the line hasn't progress.
What should I do?
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