Ok, so, i got a Powerbook G4 5.8 (1,67Ghz G4, 2Gb DDR2 Ram, Replaced the HDD to a 160GB one and High Res Display). The old HDD was basically dead so i had to replace it with another one that seems to work pretty fine and make way less noise. The problem is that randomly the Powerbook will black screen and enter sleep mode and it doens't turn on again until i plug in the charger. When i do it, the powerbook turns on again (And i can see it was in sleep mode, not completely turned off) but the battery is at 0%. If i let it load until about 10-15%, unplug and plug again the charger it comes back to the old battery % (For example 80%) and works again. What could it be? The battery or the 160Gb HDD? Thanks!