urgent-----need help

I have a PowerBook G4 with leopard installed(recently upgraded from panther). i bought it on ebay and it came with a new battery(real apple battery)(total cycles:89).

it was working perfectly until i installed leopard on my powerbook. Now my in my battery info it says "battery is not charging" all the time
the ring on my powerbrick doesn't even light up and none of my battery lights light up!!!
Also I have reset all the hardware possible to reset.
and I deleted(but backed up): com.apple.PowerManagement.plist
in the directory: /library/preferences/systemconfiguration/

all this happened only a few days after the install of leopard(happened the day of installation, for about 5 minutes, so i ignore it at first), but a lot of people have been having this problem since leopard...

heres my power info
_______________________
Battery Information:

Charge Information:
Charge remaining (mAh): 3
Charging: No
Full charge capacity (mAh): 4051
Health Information:
Cycle count: 89
Battery Installed: Yes
Amperage (mA): 0
Voltage (mV): 10866

System Power Settings:

AC Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 10
Dynamic Power Step: Yes
Reduce Processor Speed: No
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Wake On Modem Ring: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 2
Dynamic Power Step: Yes
Reduce Processor Speed: No
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On Modem Ring: No
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes

Hardware Configuration:

Clamshell Closed: No
UPS Installed: No

AC Charger Information:

AC Charger (Watts): 0
Connected: Yes
Charging: No
____________________________
i know this cannot be hardware related because it worked perfectly until i installed leopard.
need help asap(+ i cannot afford a new battery/charger)

Sounds like a firmware problem...

Try resetting the Power Management Unit a rest as in the following Apple Link:-


Resetting PowerBook and iBook Power Management Unit (PMU)

harryb2448 said:

Try resetting the Power Management Unit a rest as in the following Apple Link:-

Apple Portables: Resetting the System Management Controller (SMC)

Click to expand...

I have already reset the PMU, PRAM, NVRAM.

EDIT: also I know it's not hardware because my screen gets brighter and it's able to run on charger alone when it's plugged in, so it's getting enough power. i dont know if it knows what to do with the power or what.