Entering bootloader upon every restart

[hercules]

I thought my phone was bricked because it got stuck in bootloader one day upon restart and reflashing did not fix. I figured out that it restarts into windows mobile when it is plugged up to the wall and it works 100% normal. But if I am away from my wall charger and I restart it the phone gets stuck again in bootloader until I plug it up and restart. I have seen other people with the same problem in the forums but never a solution. Any suggestions? Is there a piece of hardware I can replace to fix this?