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Answer to "iPhone screen won't work after replacement"iPhones, specifically from the 6s and up, have always been very fickle about power during screen replacements. If you didn’t disconnect the battery before removing the connector for the screen, sometimes it will overcharge something controlling the backlight or LCD on the logic board. Also, after disconnecting the battery, you will have to discharge the logic board to remove any residual charge on the board and in the screen. I’ve had my fair share of this happening to me as I used to manage a 3rd party apple repair center. There are 2 possible failure points. 1) the connector pins on the board are slightly askew or bent, and 2) the battery wasn’t disconnected before the replacement was attempted. Both of these can be fixed, if you know how to and are comfortable with microsoldering. If you aren’t comfortable doing so or don’t want to pay someone to, you’ll have to purchase a new logic board for the specific device, storage size, and carrier to ensure a proper compatibility. Best of luck to you
Answer to "Stripy colored blurry lines"The lines could mean a few things. 1: It could be the screen showing signs of potentially going out. 2: Could be that the display connector may have come a little bit loose. 3: If you’ve ever had your screen replaced, it could be that the screen was not a good quality replacement and/or may be bad. Any of these would mean opening the device (carefully) to diagnose. Based on what you said about pressing on the upper-right portion of the screen tells me the display connector may have come loose. That doesn’t necessarily mean anything bad, but if you do decide to open the device, please -for your device’s health and your own sanity- make notes on where the screws came out of and make sure they go back in the same place! If you pop the connector off and connect it back (again, carefully) and it’s still doing it, try to make an appointment with your nearest screen repair place or order a screen from here! Btw, the full assembly makes the repair a WHOLE lot easier. Also, for your convenience, here’s the iPhone 6 sc...
Answer to "Battery has swolllen, can see the damage on the device"You should receive everything you need to perform the repair in the kit. Other damages to the device could potentially be to the trackpad, case, and -if it's bad enough- the keyboard. I'd really recommend replacing the battery first before you try looking into other damages as just replacing it may be enough. I've seen MacBook batteries so swollen they are literally crackling and moving after being taken out and the device was fine after the replacement. Just be careful!! :)
Answer to "What is the ylod"The YLOD is when the system is no longer functioning properly and displays a flashing yellow light on the power indicator. If you are experiencing the YLOD, there are a myriad of reasons why it could be. More often than not, a component on the board has failed and the system determined it critical and detrimental to continue running. This link will give you ideas as to what caused it. P.S. I found this in that link: The Yellow light of death is used by the PS3 to indicate a hardware failure with the consoles motherboard. There are a lot of things which can go wrong with a motherboard, and this is by no means an exhaustive list. The most common reason for Montherboard errors in Consoles is caused by overheating. Consoles have notoriously bad air flow and push their thermal limit rather regularly. This usually results in solder (a material used to connect computer components) heating to a point where it liquefies and detaches. There are many components for which losing solder is non-fatal, but many YLoDs are ca...
Answer to "Keyboard not registering the Letter l & n when depressed"Seems like there might be something preventing the keys being pressed under the key. Try removing the keyboard and giving it a good clean with compressed air just to see if that's the issue. For your convenience, I've linked the keyboard replacement guide to help you, should you need it. Toshiba Satellite C660 Keyboard Replacement