Black screen of death while replacing charging port
I have been using this phone for about 5 months. It was has a broken micro USB port when my friend gave it to me. The usb connection works when I bend it very hard (with almost 30 degree angle). It seemed very unhealthy for my device. And I bought a charge cable for dock port. Before one week, I decided to sell this phone and get a new phone. While waiting for my charging port shipment, I removed the old broken one. Put the motherboard back, connect battery, close the case and done. I turned on phone and it's worked fine. I put my SD and Sim in. It said "Shutting down". I think it was for Sim card. And gone. When I press the power button nothing happens. When I hold the power button, device vibrates, backlight of the screen lights for half seconds and device turning off again. Sony logo, any led light, any sound, nothing shows up. When I hold power + volume down, it vibrates, Sony logo shows up for 1-2 seconds, no led, no sound, and turning off again. When I try to charge it with my powerbank (have a charging status indicator on it), it says charging, not charging, charging, not charging. Every 2 seconds, it changes status between "charging" and "not charging". I thought maybe its about battery, but makes no sense. When I unscrew battery, I put it to an empty and safe place.
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