iPad mini không sáng đèn màn hình
step 1: Measure the resistance of sockets. If lost -> use zxw to tracking and joining the wires (yellow frame). If The wires lost resistance from both sides -> broke at CPU.
step 2: the capacitors (purple frame) on supply voltage screen line, if shorting -> isolate and remove.
step 3 (green text): take a look at the resistances (green frame). If doubt -> replace same value.
step 4: 4v vbatt supply for regu here, if didn’t have -> lifting vbatt for it.
step 5: measure enough everything, but voltage still didn’t have here -> replace IC supply voltage screen.
yellow text: Don’t forget this one, if it pilling off, it made error at screen too.
Note: Ipad mini rarely error undisplay screen. Most of them were by bad screen or error at main -> light didn’t work. IC supply voltage too strong to die, if socket still well -> try to short lifting the lead voltage wire.
step 2: the capacitors (purple frame) on supply voltage screen line, if shorting -> isolate and remove.
step 3 (green text): take a look at the resistances (green frame). If doubt -> replace same value.
step 4: 4v vbatt supply for regu here, if didn’t have -> lifting vbatt for it.
step 5: measure enough everything, but voltage still didn’t have here -> replace IC supply voltage screen.
yellow text: Don’t forget this one, if it pilling off, it made error at screen too.
Note: Ipad mini rarely error undisplay screen. Most of them were by bad screen or error at main -> light didn’t work. IC supply voltage too strong to die, if socket still well -> try to short lifting the lead voltage wire.