Maybe someone can help me with my issue...

Phone will not turn on, just replaced the battery and now the Red LED light blinks when I plug it in.

Obviously it's not getting a charge, but when I hold down the power button, it will blink for almost exactly 8 seconds and then stop blinking for a moment, and then resume blinking and repeat.

This phone is not rooted, and I just replaced the screen on it before it went to ****.

After that, it turned on once, I rebooted it to put the SIM back in, and it wouldn't turn back on.

I have a new USB Charging Port and Flex Cable assembly coming, and I'm hoping that will fix it, but if it doesn't, the only other part that I can think of is the motherboard, and I don't want to have to pay $100 to replace the mainboard... Maybe a bad antennae cable, or some sort of POST check that doesn't pass before the battery will initialize?

The phone is out of warranty, and I am not above replacing parts.

Any help is appreciated!