When an iPad Air or iPad Pro 9.7 comes into your shop with a dead WiFi module, greyed-out WiFi toggle, or a board that won't detect any networks at all, the fault usually traces back to one small component on the motherboard: the WiFi IC. The 339S00108 is the exact replacement chip for this failure point, and it's become a standard bench part for technicians handling iPad board repair in Lahore, Karachi, and Islamabad workshops.
WiFi IC failure on iPads shows up in a few recognizable patterns. Sometimes the device simply won't find any networks, no matter how many routers are nearby. Other times WiFi turns on but drops constantly, or the toggle switch in settings stays greyed out and unresponsive. Liquid exposure is the most common cause you'll see on the bench, since the WiFi IC sits close to board areas that take moisture damage first. Physical drops that stress the motherboard, or a previous repair attempt where reflow heat wasn't controlled properly, can also damage this chip. Before you commit to a full IC change, always run diagnostics first: check for corrosion around the chip, test continuity on the antenna connections, and confirm the fault isn't actually the WiFi antenna cable or flex before assuming the IC itself is dead.
Once you've confirmed the fault sits at the IC level, the repair process follows standard reballing practice. You'll need to remove the damaged 339S00108 chip using a hot air rework station set to the correct temperature profile for this package type, clean the board pads thoroughly, reball the new chip using an appropriately sized stencil, and reflow it back onto the board under a microscope for placement accuracy. Getting the reflow temperature wrong is the most common way technicians damage surrounding components, so patience here matters more than speed. After remounting the chip, a full functional test, connecting to a 2.4GHz and 5GHz network and checking signal stability, confirms the repair actually worked before the device goes back to the customer.
This chip fits into the board-level repair workflow that separates serious repair shops from basic screen-and-battery shops. Customers bringing in a WiFi-dead iPad have usually already been told by other shops that the board is unrepairable and needs full replacement, which is a far more expensive fix. Being able to source and reball the exact 339S00108 chip lets you offer a genuine repair instead of a costly board swap, which builds repeat business from customers and referrals from other technicians who don't do board-level work themselves.
Since this component sits directly on the motherboard, ESD precautions matter throughout the whole job. Use a grounded mat and wrist strap when handling the board, and keep the chip in anti-static packaging until you're ready to reball it. Store spares in a dry box if you're keeping stock on the shelf, since these chips can be sensitive to moisture exposure even before installation.
KB GSM Store stocks the 339S00108 WiFi IC specifically for technicians doing this kind of board repair work, so you're not stuck improvising with a mismatched part or guessing at compatibility. Order it alongside your reballing stencil and hot air station setup if you're building out a dedicated iPad board repair bench.
