Atrix won't boot - even with factory cable
I have a Motorola Atrix 4G on Bell Mobility. Currently the phone will not boot at all. The phone is out of warranty.
When this started I began by searching through the xda forums and found several similar problems. Most pointed to the sleep-of-death or a charging adapter problem. I have tried charging with the Motorola adapter that came with the phone, a USB cable and the Motorola Lapdock. None of these have provided any happy. Each time I tried, I left the phone overnight, when I checked on it, the phone and battery were cold. I tested a known-working battery from another Atrix and the phone would still not boot.
Some other searches point to a factory cable. I bought one on Ebay however the phone will not boot. I tested the cable on a known-working Atrix and it works fine. I did notice that when I plug the factory cable in to my phone and in to my Windows 7 PC, it detects *something*. Under device manager I see an unknown device called "APX". So far Google and xda searches haven't been able to provide me with a correct answer.
When I plug in the regular USB cable the green LED turns on for a while, if I touch the power button, the green LED goes out. RSD Lite does not detect anything, I assume this is because the phone is not in RSD mode.
I have tried combinations of volume buttons/power button as well, both with the wall charger and with the factory cable. Nothing displays on the screen at all no matter what I've tried. The phone had the stock install from Bell however was rooted with SuperOneClick (obtained from xda forums and installed many months ago) and had no third-party apps on it.
This death seemed to start slowly, at first battery life was at times terrible, then it moved on to not wanting to power on for a while if the battery died or the phone was turned off when the battery was low. Removing/re-inserting the battery several times typically helped. Eventually the phone got so bad, when it booted it would just crash repeatedly with a message about motorola.home.something (sorry I don't remember exactly what). Hitting force close would just bring the message back up again. I left the phone off overnight and the next morning, R.I.P. my Atrix
I have access to Windows XP or 7 as well as Linux.
Any help would be appreciated. Also I apologize for the long-winded post, I'm trying to provide as much information as I can.