Thank you guys so much for the advice and help.

However, it still does not seem to work.

I disrupted the booting by pulling the battery out several times and letting it rest for 10 seconds. Then i put it in again and wait a few seconds to minutes. When i try to power it on, same thing happens.

I also tried to press the U button while the phone was off and connecting the data cable to the phone. No response but 1 vibrate and a red flash on the led.

Please let me know if i'm doing anything wrong or if there's any more i can do.