Recently we had an iPad Air 1 in with backlight problems after a regular customer had replaced someones digitizer. This is a very common fault if the LCD is disconnected whilst the screen is on, and is usually caused by a blown filter.
We see this fault, amongst other backlight issues on idevices on a daily basis, we always start by checking with a known good screen. We then visually inspect the connectors and backlight circuits. Next we check filters and fuses which are usually found visually before testing. This is followed by checking for shorts and then we check our voltages.
70% of the time we will be able to physically see what the issue is with backlight faults, which usually makes fault finding very easy. This particular job just needed a quick visual check to see that one of the backlight filters had blown.
We removed the filter to find that one pad had also burnt off. This was not a major problem as we were able to run a micro jumper from the end of the remainnig trace onto the new filter to restore the connection.
This brought the ipad back to life restoring the full backlight.
We cleaned it up and sent it back on its way for another speedy repair and a happy customer that will come back again.
We take pride in our work and ensure that every job brings a happy customer at the end of it. If you have an issue with your device, or if you run a repair business and need a reliable company to outsource your board repairs to please feel free to get in touch.