BGA reflow vs reball — and when each matters

If you've sent a console, laptop or graphics card in for diagnosis and the verdict came back "the GPU or SOC is suspect," the next conversation is almost always about reflow or reball. They sound similar, they're often quoted at similar prices on cheap auction-site repair listings, and they are not the same job. One is a heat-cycle hoping the existing joints remake themselves. The other is a full chip removal, clean, and re-soldering from scratch.

BGA (Ball Grid Array) packages dominate modern electronics. The main SOC in a PS4, PS5, Xbox or Switch is a BGA. So is every modern GPU die, most NAND flash chips, and a good chunk of the network and power controllers on a typical motherboard. When the joints under one of these chips give up — and they will, eventually — the repair options narrow to reflow (cheap, sometimes works, sometimes temporarily) or reball (more reliable, more expensive, more skill required).

Knowing the difference up front saves you money and saves you the disappointment of paying for a "fix" that lasts three months.

What a BGA is

A Ball Grid Array chip has its electrical connections on the underside of the package as a grid of tiny solder balls, instead of legs or pads around the edge. A modern console SOC can have well over a thousand of these joints in an area smaller than a postage stamp. A GPU die is similar.

This matters for two reasons. First, the joints are invisible. They sit under the chip, sandwiched between the package and the PCB, so you can't inspect them with a microscope or reflow them with a normal iron — you can only see the chip itself. Diagnosis is harder than for any other type of solder joint.

Second, thermal cycling fatigue (TCF) is the dominant failure mode. Every time the chip heats up under load and cools down again, the package and the PCB expand and contract at slightly different rates. Over years, this micro-flexes the solder balls until one cracks. A single cracked joint anywhere in the grid can drop a signal line, a power rail or a memory bit, and the chip either fails outright or starts doing something subtly wrong — artefacts on a GPU, no-video on a console, random crashes on a laptop.

Reflow — what it is, when it works

A reflow brings the chip up to solder melting temperature without removing it from the board. The existing solder balls liquefy under the package, surface tension pulls them back into shape, and (in theory) any hairline-cracked joint heals itself as the solder fuses back together.

Reflow works for hairline-cracked joints and intermittent faults that respond to heat — the classic example is the original Xbox 360 RROD, where a heat-gun reflow would temporarily resurrect a huge percentage of dead consoles.

Reflow does not work for oxidised joints, lead-free balls that are past their fatigue life, mechanical damage from a drop, or actual IC die failure. If the silicon is dead, no amount of heating its legs is going to wake it up.

Honest success rate: 50-70% short-term, dropping to 30-50% past six months. The original fault often comes back, because the underlying problem — fatigued lead-free solder — hasn't been solved. You've just smoothed over a crack. The chip will keep thermal-cycling and will eventually crack again, sometimes within weeks.

Reball — what it is, when it works

A reball is a full chip removal and re-soldering. The chip is heated and lifted off the board. The old solder is stripped off both the chip's underside pads and the PCB's pads using hot air and desoldering braid, leaving clean bare copper on both sides. A stencil is aligned over the chip, fresh solder balls are placed into the stencil holes (or solder paste is applied and reflowed into balls), and the chip is then reinstalled on the board with fresh joints all round.

Reball works for oxidised or dead balls, GPUs and console SOCs where you want a permanent fix, and NAND swaps for data-recovery work where the original chip needs to come off and go onto a donor board.

Reball does not fix failed silicon — if the die inside the package is dead, fresh joints under it won't help. It also doesn't fix lifted, oxidised or scorched PCB pads, which is a separate (much harder) repair.

Honest success rate: 80-95% when the silicon is good. Workshops that take reball seriously will warranty the joint itself for the life of the device — because if it's done properly, with fresh lead-free or leaded balls and a clean PCB, the joints should outlast the rest of the hardware.

The cost difference

Rough UK pricing, mid-2026, for context:

• Reflow: £80-£150 for a console SOC, £100-£200 for a desktop GPU.
• Reball: £150-£250 for a console SOC, £200-£350 for a desktop GPU.

The reball price is higher because the work is genuinely harder. It needs a proper preheater and hot-air station (not a heat gun), a chip-specific stencil, fresh solder balls of the correct size and alloy, and a microscope. The labour is two to four times longer. And the skill floor is higher — a botched reball can lift PCB pads and turn a fixable board into scrap.

When neither is the right answer

Some boards genuinely can't be fixed by reflow or reball, and an honest workshop will tell you up front.

Failed die. If the chip itself is dead — silicon failure rather than joint failure — your only option is chip replacement. For a console SOC or a GPU die, the replacement chip often costs more than a working second-hand console or card. We'll tell you when we think this is the case.

Lifted pads. If the BGA pads on the PCB have lifted, oxidised or burned (sometimes from a previous bad repair attempt), the board needs BGA pad repair before any chip can go back on. This is the most senior microsurgery skill in the trade and not every workshop offers it.

Modern stacked NAND or package-on-package (PoP). Some modern memory chips physically can't be reballed without specialised equipment — they're multi-die stacks, or they have another chip soldered on top of them. These need a different approach entirely.

What we do at the workshop

Both, case by case. Our preference is reball when it's economically sensible — better outcome, lifetime warranty against the joint failing again, no awkward conversation six months later. We'll quote reflow where it genuinely is the right tool: an intermittent fault, a budget-constrained repair on an older board, a customer who understands the odds.

We turn down reflow jobs where the customer wants a guaranteed fix but only reflow is in the budget — it's not fair to take your money for a repair that statistically has a coin-flip chance of lasting. In that situation we'll either quote the reball honestly or tell you the device isn't worth saving.

Every board gets a free pre-flight check before any work is committed. You get our honest read on whether the silicon is alive, whether the joints are the actual problem, and which repair (if any) makes sense — before you commit to spending anything.

If you've got a board you suspect has a BGA fault, see our soldering repair page for how to send it in.

See also

• Microsoldering vs through-hole: which your repair needs
• Lifted pad rescue with kynar wire
• HDMI port repair — what happens on the bench