Are you asking about an iPhone 5S or an iPhone SE. From a logic board perspective, there is a huge difference.
Assuming a 5S, there is one backlight anode and two backlight cathodes. I would check those circuits first. FL24 is the anode (which obviously works) and FL25 & FL26 are the cathodes. One of those, or the associated capcacitors, has probably failed. If they look good, then check the rest of the backlight circuit.
The iPhone SE has two drive circuits (coil & diode) for the anode.
Are you asking about an iPhone 5S or an iPhone SE. From a logic board perspective, there is a huge difference.
Assuming a 5S, there is one backlight anode and two backlight cathodes. I would check those circuits first. FL24 is the anode (which obviously works) and FL25 & FL26 are the cathodes. One of those, or the associated capcacitors, has probably failed. If they look good, then check the rest of the backlight circuit.
The iPhone SE has two drive circuits (coil & diode) for the anode.
Are you asking about an iPhone 5S or an iPhone SE. From a logic board perspective, there is a huge difference.
Assuming a 5S, there is one backlight anode and two backlight cathodes. I would check those circuits first. FL24 is the anode (which obviously works) and FL25 & FL26 are the cathodes. One of those, or the associated capcacitors, has probably failed. If they look good, then check the rest of the backlight circuit.
The iPhone SE has two drive circuits (coil & diode) for the anode.