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Appleの第7世代iPadの修理と解体ガイド情報です。

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Ghost touching WITHOUT the digitizer connected!

Today I replaced the digitizer on an iPad 7 due to it being smashed. Everything went smoothly and before I stuck the screen down I went to verify everything worked. When turned on, the screen would go erratic and it locked itself out due to ghost touching. I opened it back up to check everything and can’t seem to find any errors. I’ve checked the connectors under a microscope and they’re all good. I thought I’d try power it up with the digitizer and home button disconnected and to my disbelief.. it was still ghost touching. Can anyone suggest what I be wrong? Someone has mentioned it looks like the lcd may be faulty but I don’t see how that’s possible when it’s detecting touch with the digitizer disconnected. Any and all help is appreciated. Thanks in advance!

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I have the same problem.

さんによる

I refurbish iPads as a retirement hobby. I've been doing this almost 4 years and have done over 500 refurbishments. I presently have three 7th Gens and each one of them is experiencing this ghosting problem...all without a digitizer connected! I can understand having one do this, unlikely to have two but three??!! All of these had been updated to iPadOS 14.0 BEFORE the cracked screens came off so I'm just wondering if the update has anything to to do with it. This is a seriously unlikely situation.

Fortunately I own all of them; otherwise I'd be owing three customers a ton of money.

さんによる

Hey David you ever get any of your ipads working again? I have the same issue and nothing I tried seems to be working. I'm hoping it has nothing to do with the board itself but since it's ghost touching without the digitizer or LCD connected I think that's the most likely answer.

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Is the housing bent on the sides in any way to where the logic board might be bending? Have you tried cleaning the digitizer connectors on the board with 99% isopropyl alcohol to see if it may fix the problem?

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Hi Ben. There’s no damage to the housing or bored, everything seems in pristine condition. Are you suggesting there may be residue of some sort across the connector terminals causing interference? I’ll try giving all the connectors a clean with isopropyl however as stated above, the ghost touching also happens with the digitizer disconnected which leads me to believe it’s nothing to do with the digitizer itself but possibly the circuitry for it.

さんによる

Yeah my guess would of been some sort of residue causing interference like you've said.

I have had ghost touch digitiser issues in the past on iPad 5 / 6 mostly due to either needing to reseat the connector or a faulty digitizer. Haven't had an issue like this where it would ghost touch with nothing connected very bizarre.

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Restore it? I’ve had a lot of problems caused by software updates then fixed with a restore (best example: I updated my iPad mini 3 to iOS 9, and the App Store got deleted. I had to restore, lest I loose the App Store)

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Have you managed to fix this issue? I’m having the same problem and even made a similar post on the matter but I haven’t been able to get my lcd to work properly and don’t want to dish out $200+ for a new oem one.

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I managed to fix this on an ipad 7th gen by:

Disconnecting the battery,

cleaning the connectors with isopropyl alcohol

fitting a &new* digitiser to the ipad(not the same old one).

Maybe I got lucky… the ipad in question has had some frame damage and seems to have intermittent issues (according to the owner FWIW) with charging and screen staying on. today was the first time it had been ghost touching with no digitiser connected, but appears to be fine now.

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sean さん、ありがとうございました!
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