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The 5th Generation iPad Air was announced on March 8, 2022. It features the M1 chip and 5G connectivity.

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ipad completely dead after touchscreen replacement…

Hi folks,

i recently replaced the touchscreen for an ipad air, it was broken and didn’t work, i kinda was in a hurry and because i couldn’t turnnoff the ipad anymore i opened it up with ipad still on… i replaced the touchscreen but now the ipad does nothing anymore… it doesn’t even get found by itunes when i put it in my laptop… i realise i &&^&@@ up somewhere but can i still save it? can i measure somewhere if there’s still power coming from the battery? the guy told me the battery wasn’t very good anymore but now it seems completely dead all of the sudden… can’t reset, nothing… 🫣

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hello there,

As a result of trying to plug in the touch/screen connector and (literally) run the keyboard-pins over the adjacent pins of port, you introduced 3.8V to the data lines, which receive 0.8-1.8V. In extreme cases (matrix) you sent 12/18V from the backlight circuits to i2c (0.8V) straight to the processor, which usually ends in the death of the device. The good news, however, is that this happens extremely rarely and you have to be incredibly unlucky to encounter such a case. This can only be confirmed by an electrical test and a current start-up assist. If this is the case, your iPad is rubbing a constant current of about 0.20A at startup. It seems to me that you connected the touch power supply to the control line and fried two inductors and a pull-up capacitor - which, due to its parameters, did not break into pieces but directed the 1.8V signal straight to the housing (classic short circuit). You need to analyze it, desolder the culprits, which will bring your iPad back to life - which I sincerely wish you. For the future, remember - never ever, perform operations on a connected battery of induction systems (in such cases, the voltages are much higher than the nominal ones - such as powering the matrix backlight). We start by disconnecting the power source and finish a work by connecting the power source. The safety rules for you and your equipment still apply.

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thx for that! do u know of any videos or webpages with a step by step explanation to give me a fighting chance to fix this? much appreciated!!

da

@nr1freak Unfortunately not. You will need a multimeter and a microscope or at least a strong magnifier (e.g. an iPhone magnifier on a tripod). Take a photo of the motherboard, I will tell you where and how to measure. However, to remove the damage, you will need a precision soldering iron (and it cannot be cheap Chinese scrap), perhaps a hot air soldering iron (depending on the damage), some tin paste or tin wire, good flux ($20) and some experience in using all this. However, if it seems too much, find a good repair shop - the price for the repair will be half that of buying the equipment, the training time necessary to carry out such a repair and the certainty that someone experienced will do it right. Don't take risks if you're not sure you can do it.

da

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nr1freak sarà eternamente grato.
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