I have a Power Book G4 that I recently installed a new DC board in because the old one became loose and would not work anymore. I was careful with everything and now the computer freezes up when its turned on sometime right away. I had it working for a little bit and tried checking the heat temps and fan speed. The fans were not on and the temperatures seem normal nothing over 54 degrees. Also, sometimes it tells me it needs to restart now and then wont turn back on. Any suggestions? Thank you for your time,