power help

[paukel]

Hi,

I have a 2007 Macbook 2 GHz Intel Core Duo.
Decided to upgrade memory to 2 GB.
Followed instructions in manual ensuring memory pushed in fully.
After fitting the Macbook wouldn't start up so I refitted the original memory,
but still got no response.

Thinking I hadn't pushed them fully home, or had bought the wrong type I repeated the proceedure several times, with both old and new memory.
Was about to give up when the fan started whirring and it started up without incident, although the green light on power lead wasn't lit and wouldn't recognise battery.

Checked memory in profiler and it showed the updated 2 GB.

Tried resetting system management controller as many symptoms present but to no avail.

At present the power button often doesn't respond to switch on.
When it does decide it wants to work the following occurs:
The fan is always on.
The green power lead light is never lit.
The battery is not recognised but will power the Macbook when the power lead is disconnected.

Previous to this I had no problems apart from a failed optical drive over a year ago which I didn't replace, I just used an external drive which works fine.

Any help and advice much appreciated.

 

[Knoodles]

Reset PRAM.

Shut down.
Restart holding down command+option+p+r until you hear the startup chime 3 times.
Release keys and continue startup.

 

[paukel]

Thanks for your reply Knoodles.
Unfortunately no changes after resetting.
Followed your instructions and got 3 chimes etc. but still the same.

 

[Knoodles]

Can you run the hardware test disc that came with the computer?

 

[paukel]

Will give it a go, and let you know.
Thanks again.

 

[GGJstudios]

Reset PRAM..

PRAM has nothing whatsoever to do with power, charging or batteries. It will not help at all.

Any help and advice much appreciated.

This should answer most, if not all, of your battery questions: Apple Notebook Battery FAQ

Note the section on CHARGING for links to troubleshooting resources.

 

[paukel]

Unfortunately can't start up and run the hardware test.
Probably due to my external drive having USB connection?
Thanks for the battery info.
Up until now it gave no trouble.
Are they that fragile that removing them renders them useless?

 

[GGJstudios]

Are they that fragile that removing them renders them useless?

No, not at all. You might check to make sure it's properly seated. If you've tried everything else, I'd recommend a trip to the Apple store, to let them look at it.

 

[paukel]

Thanks, will take a closer look.

 

[paukel]

Removed battery.
Still woudn't power up when connected to power lead.
Started loosening a couple of screws on casing while pressing power button and it started up.
Does this indicate a loose connection, damaged circuit board?
Does this eliminate a battery or power lead problem if the fault is the same regardless of the power source?