Bumping this for similar situation...

I have already seen http://talk.maemo.org/showthread.php?t=87709 but whenever I try flasher -i and plug in my phone, it just says:
"Suitable USB interface <bootloader/phonet> not found, waiting..."

I don't get the sound from Windows indicating a USB device has been plugged in either.

What gives? I bought a new battery and plugged in, but no difference. Now, the new battery could also be complete drained of a charge, but if the phone won't charge it, what then?

Here's the back story, FWIIW:

My phone died yesterday, not being able to charge, so I bought a new stock battery and switched it, following a Nokia N9 disassembly tutor. Problem: It still won't charge. I tried taking out the battery for a few seconds and put it back in, and I tried the old battery again, both times making sure I didn't accidentally switch on the phone while reassembling.

When I plug the phone into the charger (using stock charger in wall socket), the charge LED turns on solid for 10-15 seconds and then shuts off. When plugging it into the USB, it get the same solid LED light, but sometimes followed by it blinking fast for a while, before going dark.

It does not, however, come to life, and the "breathing/pulsating" charge LED light never activates. The blinking light is much faster than it normally is, and I'm assuming it's indicating something, but I don't know what.

I sometimes get a small vibration when trying to turn it on, indicating to me that there is some kinda charge left on the battery, while faint. It shows no life, however. The Nokia logo never appears. It stays off after the initial vibrate and won't vibrate again if I try turning it on again. I have to mess around unplugging and re-plugging it to the charger to get it to vibrate again.

Tried charging it through the wall socket for at least 6 hours. Still, no life. Tried via USB, no life.

My phone's stock battery only died yesterday, after working two days ago, although with long times of huge charging problems (phone would only fully charge after a full 24 hours of charging, giving me the notification that USB charger is too weak to charge the device. Battery charge was gone after only a few hours of working, however).

So is my issue simply due to a dead battery, or are there other hardware problems? I will probably go to Nokia Care, if there's no other solution.

Is there any way to "force charge" the battery, since the phone doesn't seem to let it charge as it is now?