Released September 16, 2016. Model 1660, 1778 Available as GSM or CDMA / 32, 128 or 256 GB / Rose gold, gold, silver, black, and jet black.

880 Vragen Bekijk alle

LCD working only when battery is fully discharged

Hello everyone,

I have an iPhone 7 and it had some problems with LCD before - there was some stripes and noise on the screen sometimes. But now after changing back cover it looks like screen is not working when phone is booting nor when phone is fully booted. I have some positive feedback like phone vibrating when home button is pressed or recognition by PC, sound is working but screen is just black without backlight.

Only time when screen works is when battery is drained and phone is showing charging icon. When battery gets to current where iPhone turns on then screen is dead.

Block Image

I tried different screen but same result. Problem has to be on MB. Have anyone ever seen something like this before?

Thank you for any ideas.

Beantwoord! View the answer Dit probleem heb ik ook

Is dit een goede vraag?

Score 0
Een opmerking toevoegen
Verspreid de kerstsfeer
Krijg 12€ korting op je aankoop van 50€ of meer met de code FIXMAS12
Verspreid de kerstsfeer
Krijg 12€ korting op je aankoop van 50€ of meer met de code FIXMAS12

1 Antwoord

Gekozen oplossing

When the battery is charged and you don't get that "charge battery" screen, connect it to iTunes and let the phone boot. Then shine a bright flashlight on the screen. If you can see a dim image, then your backlight circuit has failed. It's not entirely clear why you can see the charge screen but may have to do with intensity. I suspect the backlight filter is partially failed and works a bit but can't sustain high current.

Was dit antwoord nuttig?

Score 2

Commentaar:

You were right. I tried that before but didn't see anything. Now I see that backlight is really broken. Do you think change of U3701 should be enough? Thank You!

door

Start by checking the filter (FL3901) and then check the diodes (D3701/D3702) before moving onto the IC.

door

Een opmerking toevoegen

Voeg je antwoord toe

BScom zal eeuwig dankbaar zijn.
Weergavestatistieken:

Afgelopen 24 Uren: 0

Afgelopen 7 Dagen: 0

Afgelopen 30 Dagen: 0

Altijd: 36