Apple seems to have set another booby trap!

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We had an iPhone 13 in for a screen repair. The customer could not afford an OLED so we supplied an LCD (which up until the new IOS release worked fine.) However the customer returned because the iPhone 13 would not upgrade to the latest IOS. We knew that the board was 100% so we looked at the battery, the charge port both of these were reporting 100% OK but whenever you tried the update it downloaded the IOS but would not install it, just went to black screen after the Apple logo flashed up. We were stumped, we even put the board into a new chassis, still the same problem? Has Apple been up to its usual trickery again?

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We called a friend who is an absolute whizz on iPhones and straight away he informed us to remove the LCD and replace with an OEM OLED screen which we did. Bingo! It all worked fine. It appears in the latest IOS release that Apple have monitored the voltage that the LCD is pulling as the LCD pulls more volts than an OLED screen, in this case Apple seems to have blocked the upgrade to the latest IOS using an LCD. We are not sure if they have done this on iPhones 12 thru 16, we are testing at the moment, also we are not sure if it is only certain brands of LCD, there is a lot of testing to do, to test all models?

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We will keep you posted on our test results but in the meantime if you have the same problem please report on this blog. Thank you.