regarding replacing I/O board?

I'm assuming this is what I need to do with my macbook. For years the power light fades and pulsates from green to amber, not charging the battery and then magically starts working again within a couple hours. It always worked when I took it to the Apple store. Over the last year, it has become more common. A couple weeks ago, it was down for 15 hours and magically lit up sometime overnight. It went down again 2 days ago and won't come back up. I took it apart last night to see if the connector looked loose, but it didn't. I read someone's post about how they replaced their I/O board and it worked for a short time and then stopped working again.

Before I spend $100 buying a new board, is there any reason theirs would work and then stop, other than a faulty board? I don't remember if they said where they bought it but I see one for sale on this site with a 6 month warranty.

I would rather put the money towards a new computer, but I can't afford to update my Adobe software right now. And if I can't use it, I can't make any money.

Thanks for any comments, suggestions or warnings.

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Deck the Halls
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The first thing I would do is see if the simple stuff fixes your problem:

- Clean the MagSafe connectors system and charger with Isopropyl alcohol with a cotton swab.

- You should try a second charger to be sure here.

- Open the system up and look for any water damage. You may want to go though the process of taking the Left I/O board out (Fair warning here its a bit of work) looking on the underside of any damage. iFixIt guide Left I/O Board

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