MacBook keeps blacking out for a few seconds

I have a weird new problem. It started blacking out (I thought it had switched itself off but it hasn't, it comes right back as it was after a few seconds) around every half hour or so. But now, just a few days after the problem began, it is blacking out every few minutes. Luckily it comes right back on and I don't lose anything, but it is annoying and certainly not right! Any ideas what this could be related to and how to fix it?

It sounds like it is either the inverter cable or the inverter board. Probably the latter. You can find repair guides, parts, and tools on ifixit.com. If your computer is under warranty, take it to an Apple store and have them fix it.

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