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Hi guys. I need help with an iPhone 6. Mind you this is not the first iPhone 6 LCD I replaced so I’m not exactly a beginner. I did everything by the book as I replaced the cracked screen and everything seemed okay after reassembly. But after about 30 minutes , an hour tops of testing the signal dropped and I can’t seem to be able to get it back. I tried disassembling everything again and looked if everything is in order and seems that everything is properly connected back. The client tried to send it back to warranty without talking to me first and they repair centre said that it MIGHT be that the motherboard got damaged while replacing the LCD but I find it difficult to believe as I have replaced and least other 20 iPhone LCDs in the past without any issue. Now of course I have to take full responsibility and I am evaluating if I should change the whole motherboard or not. If anyone could point me in the right direction and help me avoid doing that I would greatly appreciate it. UPDATE: No..the person asked if signal problem could be because he changed the screen. As for me…I really don’t know…I used plastic tools…quality spare screen. I’m asking my self now if maybe I put the wrong screw but..small update…when I do a factory reset the signal comes back for about 5 minutes in which I’m able to make phone calls after which the signal is lost again. I’m lost…can’t figure out what it is. Anyone knows where exactly I’m suppose to look for damage signs? The phone was working prior to the lcd replacement, that, unfortunately I know for a fact.
It appears like you have done everything correctly. Do you have the original cracked screen? I would try to put the old screen back and test it thoroughly. That way you can see if the problem is related to the replacement screen or the logic board. The other thing I would check is the antenna flex. iPhone 6 Logic Board Antenna Flex Cable Take a look at this image and notice it has a small conductive pad. iPhone 6 Screen Replacement That is likely meant to ground the selfie camera bracket and, who knows, maybe even act as an antenna. Sometimes, that pad sticks to the bracket more than the flex so it might not have been transferred to the replacement screen. Also, that flex is connected via four connectors underneath the logic board. Maybe one of them came loose. EDIT 2018/11/18 The iPhone 6 has unfortunately developed a “thing” for GSM/LTE connection/searching issues and over time the repair community has found some classic issues. You can read more about it below but it’s entirely possible that the the issue the OP (Rosu) has was coincidental to the screen repair. After you have eliminated antennae or network locks as the possible culprit, searching issues on the iPhone 6 are usually related to the baseband IC. The baseband IC is very sensitive, just like the Touch IC’s on the 6 Plus; it also suffers from poor quality traces and pads (which could reached the tipping point following a bit of flex during a repair). Go to your phone’s dialling keypad and dial *#06#. You should see the IMEI displayed. If the IMEI is not displayed, the Baseband IC has to be reballed and two small copper traces (U1/V1) have to be rebuilt and solidified. This is commonly referred to as the “long jumper” solution. You can check out this answer (Service is “Searching” indefinitely) (by @teetopp) as it summarizes the issue really well.
Synchronize date and time automatically / connect to Wi-Fi? Send it back to warranty meant he probably made an appointment with apple and they checked inside the phone. Well that’s bad luck to the customer because now he just permanently voided his warranty when he could’ve kept the warranty for the next time he really needed to send it back to warranty by having an original screen installed.
meh….the warranty was voided as soon as he cracked his old screen. Its a 6, so I really don’t see how they would have known his screen had been replaced unless the OP did a sloppy repair job. OP: There is nothing that you could have done to damage the cellular reception if everything went right. I’m assuming you disconnected the battery before removing the old screen, didn’t use any metal tools and used only top quality parts. I’m also assuming you didn’t do any damage by using the wrong screws. Also assuming that you didn’t use unnecessary force when putting it back together. What is possible is that when the customer dropped his phone, he did damage to the cellular system of his phone. Which again, would have voided his warranty.
I’m almost sure that signal problems was also before you change the screen it’s just was hard to see it’s because randomly. That problem very common in ip6 model signal problems the way to check when no signal dial *#06# imei check, if the number didn’t appear the modem have disconnected. Its can be repair just make sure the technician know what he doing and if he will do it good its will not happen again. The reason for modem problems is falling and the modem is sensitive sny hit can cause that.
