Reballing RAM works most of the time — if you find the right shop.

With a skilled shop using proper equipment, you’re looking at a 70–90% success rate. It’s not a guarantee, but it’s usually worth trying before replacing the whole board.

Reballing fixes bad solder joints under the chip. If that’s the only problem (common in MacBooks and thin laptops after heat cycles or drops), a good rework station and preheater can bring it back. The chip itself isn’t dead — it just lost connection.

But if the chip is damaged internally, no amount of reballing helps. And a bad shop can cook the board or leave bridges. That’s where the risk lives. The success rate drops fast if they’re using a $50 hot air station.

I’d ask the shop what their actual reball failure rate is. If they hem and haw, find someone else.

Don’t trust a shop that promises 100% success.