Hi have a G4 Power Book 12" with a power failure problem. About 6 months ago, I replaced the ac adapter after it completly failed. The new ac power adapter worked fine, but I noticed it seemed unreasonably warmer than before & the computer would get warmer too & the fan would cycle on & off more frequently. Fast forward 6 months of normal use in this condition & now the ac adapter shuts off after 10-15 seconds of use. If I unplug the adapter & plug it back in, it will work for another 10-15 seconds. I've also noticed that it will cycle orange to green back to orange again even if I touch the mouse pad or click an envelope. The battery itself has been no good for about a year & won't hold a charge. Is this power adapter going bad or has anyone experienced problems like this?