Will not power up but looks charged have it

http://support.apple.com/en-gb/HT201295

Make sure that the monitor is set to the correct input. On the Mac, got to displays and verify that the machine sees both screens.

Is the battery removable if it is then turn off your mac, take out the battery, turn on the mac with power cord connected.
Wait 2 mins then refit battery, this might work, as it works for me.

Let me know if any good, please


thanks for using FixYa

It's possible your USB slots have a lot of dust, or could be physically damaged and is causing shorts. If three USB drives have already been damaged, your best bet is to send the mac book to apple for inspection. If your warranty is up, or you're feeling adventurous, you can open the Mac Book your self and have a look at what's going on near, around, or on the USB ports.

Do you have all the latest software updates on your system?

Does this happen when it's plugged into the power supply?

If not, then it could be the battery. If it's an old computer, the battery might not be holding the charge very long.

Have you tried resetting the PRAM? Start with the notebook powered off, turn it on and press and hold Command-Option-P-R. Continue holding until you've heard 3 system tones. Then allow the system to boot.

See if that helps. If not, you may have a problem with your power supply, charging system or the battery. This would necessitate a call to AppleCare.

I recommend speaking to someone at an Apple store, or wherever you purchased it.

This may indicate that your battery is going bad and not holding a charge. Try inserting a different battery and see if the light stays green.

As long as you power the devices from the same receptacle or plug strip the MAC will be perfectely safe. Firewire and USB are fairly safe as long as you don't drive high voltage into them from failed equipment or ground loops.

This guide is for a 15 inch power book pro. It is for the mid to late 2008. The file is 30 mb and is the service manual for the laptop.

Look in the left pane and click on hard drive, it will explain the location and procedure.

http://tim.id.au/laptops/apple/MacBook%20Pro%20(15-inch%20Early%202008).pdf

is the battery fully charged? try plugging it in then press the power button again.