Won't boot, shows no signs of life

Try a new battery. When a battery swells, even a little bit, it needs to be removed from the device immediately before it risks damage to other components. Provided this has not already happened in some way with discharging or a short, a new battery should allow you to turn the device on.

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I have some concern that I spend $100 on a new battery to find out that's not the problem, and it's not worth fixing because of some other problem. Then I have wasted $100. Also, I know I have operated this laptop without a battery before.

28 mag 2016 da gregjsmith

Once you take the battery out see if the system start up with the MagSafe adapter and make sure the adapter LED is glowing (orange)

28 mag 2016 da Dan

When I take the battery out the system does not start up with just the mag safe (I tried two different adapters) and the mag safe will glow green.

28 mag 2016 da gregjsmith

I have replaced the battery with no change.

3 giu 2016 da gregjsmith

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nylanderlinus @nylanderlinus Rep: 1 · Answer 2 · 2016-06-04T11:38:06-07:00

nylanderlinus @nylanderlinus

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Postato: 4 giu 2016

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Might be the power button, if it is then you need to replace the keyboard. Can try starting the computer by putting a screwdriver over 2 connectors/soldering points on the logic board. Google starting MacBook without power button and you'll find an answer to how to do it.

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I tried the soldering pad shorting but it did not result in the computer starting.

4 giu 2016 da gregjsmith

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adlerpe @adlerpe Rep: 4,8k 14 18 6 · Answer 3 · 2016-06-04T18:28:43-07:00

adlerpe @adlerpe

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The MagSafe connector on the charger glowing green doesn't mean that the MagSafe I/O board on the computer is working; it just means that the connector on the charger is able to complete the circuit. Since:

the battery does not appear to be charging
the computer does not power up from the charger with the battery removed
shorting the power connection doesn't work when the computer is plugged into the charger

...the next logical guess is that electricity is not making it through the MagSafe DC-In board to the logic board. The next thing to try is to replace the MagSafe board; then try to power up from the charger with the battery out first. If that works, then reinstall the replacement battery, and see if the MagSafe connector on the charger turns orange. If it does, the battery is charging; let it charge up overnight, then check the charge LEDs on the side of the computer to see what you get.

A swollen battery is always bad news. It can leak nasty stuff on the inside of the chassis, and power spikes/brownouts may damage internal circuitry, which may be the source of your current problems. Get rid of the old battery immediately.

MacBook Pro 15" Unibody Late 2008 and Early 2009 DC-In Board Replacement

MacBook Pro 15" Unibody (Late 2008-Early 2009) MagSafe DC-In Board