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iPhone, iPad, iPod Hardware Repair Hardware Repair discussions for iPhone, iPod , iPad & Apple Products, help, guides. |
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01-23-2017, 00:32 | #1 (permalink) |
No Life Poster Join Date: Jul 2005 Location: karachi
Posts: 8,673
Member: 161728 Status: Offline Sonork: 100.1582708 Thanks Meter: 2,237 | iphone 6 backlight on but no display it show display when i change u2 ic before changing u2 having same problem now again same problem comes now when i power on it show backlight but no display and seems after fews seconds it turn off set was previously water damaged |
The Following User Says Thank You to HUM For This Useful Post: |
08-20-2017, 03:56 | #5 (permalink) |
Junior Member Join Date: Mar 2017 Location: Indiana
Posts: 6
Member: 2697339 Status: Offline Thanks Meter: 2 | Iphone 6 Backlight works but no Image Did you ever figure yours out? I have an Iphone 6 that was experiencing ghost touch. I replaced meson and cumulus after testing a known good LCD and no change in symptom. I changed both again to make sure there was no mistakes and still no change. I began testing voltages with screen attached when I noticed home button would not work... So I powered down, resat the connectors and when I powered back up again, I have a backlight but black screen. I tested with another lcd and same thing on it. It draws power, charges battery, Itunes sees it, just no image. I changed Chestnut, Getting the following: Caps are all testing good, Filters are all testing good BL Coil is 1, Diode is .204, resistance to ground is .507 VCC_Main = 4.2 FL2035 and FL2036 are good C1501 = 3.8 C1529 and C1502 = 6v L1500 (1 and 2) = 4.2 PP5V7... = 5.7 PN5V7... = -5.7 PP1V8...= 1.8 However, PP16V5_Mesa is only at 00.2 and 3.3 missing on Tristar is the only things that I can find that do not test out ok I was able to restore on Itunes without errors... Everything looks good except I have a Backlight with no image, tested with other LCD's any ideas? |
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