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I replaced the lcd screen and it is not working. The first screen I got was defective and the second screen is not working either. How do I confirm it’s the screen and not something else.
Hi, The LDI (liquid damage indicator) being red changes things. This indicates water has entered and some damage may have occurred. The impurities in the water causes corrosion and provides circuit paths for the electricity which were not in the phone’s operating design and could damage the components. The corrosion starts immediately and is ongoing until it is completely cleaned away First do not try to charge or to turn on your phone and then remove/disconnect the battery as soon as possible from the phone to minimize any further damage. Then you need to dis-assemble the rest of the phone and clean all the affected parts using Isopropyl Alcohol 99%+ (available at electronics parts stores) to remove all traces of corrosion and water. If possible do not use “rubbing alcohol” as in some cases this is only 70% IPA or less, can contain additives and is not as effective. If you do have to use it check the label to verify the amount of IPA. The higher the percentage of IPA the better Here is a link that describes the process. Electronics Water Damage As always with electronics, especially surface mounted pcb be gentle when handling and especially when brushing away the corrosion. You do not want to remove any components from the board. Remove the shields that may be covering some components as the water may have got in under there. The ends of any flex cables and their connectors need to be cleaned as well Hopefully after you have done all this the phone might possibly work correctly again. Here is a link to the Ifixit ZTE Blade Z Max Repair guide(s) that may help with the dis-assembly
