iPhone 6 no display after screen replacement

iPhone 6 no display after screen replacement

iPhone 6 no display after screen replacement

iPhone 6 no display after screen replacement

To protect having problem iPhone 6 no display after screen replacement you must use ESD safe tools and ESD safe working mat to avoid any electric discharge while replacing any iPhone lcd repair. Before taking out broken lcd turn off iPhone completely if possible. The first thing you will be doing is disconnect the battery connectors. But sometimes the technicians even after replacing lot of iPhone lcd can end up having no display and they could not figure out what went wrong and how to get display again. We recieved iPhone 6 from another repair shop which they had no idea why there is no display after replacing the lcd. We checked the iPhone and find out something went wrong with iPhone 6 backlight circuit.

iPhone 6 no display after screen replacement

iPhone 6 no display after screen replacement

you can see in the above picture iPhone turns on but no backlight and you can hardly see apple logo.

iPhone 6 backlight circuit components

iPhone 6 backlight circuit consists of capacitors, resistors, diode, filters and backlight ic. Diagnosing the whole circuit to find where the fault is requires schematic diagram reading ability and how to test the components on the board or circuit. we usually start with locating the filter or fuse. As filter is first component on the line to blow to save whole circuit to blow. There are around 8 filters on backlight circuit on iPhone 6. We quickly find out one of the fuse is is missing. May be the technician snipped it off.

iPhone 6 no display after screen replacement

iPhone 6 no display after screen replacement

Before putting new filter fuse it is recommended to test if it is the right voltage and working rather than testing after putting as for micro soldering go in and getup as soon as possible. How small is tis filter is see in the below picture.

iPhone 6 no display after screen replacement

iPhone 6 no display after screen replacement

we were quite happy it turns out to be a easy repair but after replacing this filter which is fl 2024 but even after replacing and testing this filter is working fine still no backlight. other components which can effect backlight are backlight ic u1502 or backlight coil l1503 or backlight diod d1501. See in below picture

iPhone 6 no display after screen replacement

iPhone 6 no display after screen replacement

We examined rest of the circuit and find one more filter blown and one capacitor snipped off.

iPhone 6 no display after screen replacement

iPhone 6 no display after screen replacement

May be the technician who was working on it got frustrated why iPhone 6 no display after screen replacement snipped of another component.

iPhone 6 no display after screen replacement

iPhone 6 no display after screen replacement

Replaced blown filter and capacitor. Now tested all other filters on the line and examine the board all other filters working.

iPhone 6 no display after screen replacement

iPhone 6 no display after screen replacement

Electronics repairs sometimes frustrating when after spending lot of time still you can’t find the fault. But at same time when it worked that is moment of joy and finally this iPhone worked fine.

iPhone 6 no display after screen replacement

iPhone 6 no display after screen replacement

iPhone 6 backlight repair where ti get it fixed

applefix hamilton at 85/a victoria street hamilton in waikato new zealand expertise in iPhone repair. if you don’t live in hamilton send your device get it fixed from professionals or call 078394188 for a free quote

 

 


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