Go Back   GSMForum BD > GSM & CDMA Phones / Tablets Software & Hardware Area > iPhone ,iPod & iPad (Apple Inc. Products) > iPhone/ipod Hardware-Repair Area
Register FAQDonate Forum Rules Calender Mark Forums Read

Thread Tools Display Modes
Old 04-25-2015, 05:52 AM   #1
Join Date: Feb 2015
Location: BH
Posts: 535
Thanks: 655
Thanked 1,367 Times in 436 Posts
Rep Power: 3
gsm_anwar is on a distinguished road
Default Iphone 4 no LCD, No Image. NO booting when LCD Connected

Iphone 4 no LCD, No Image. NO booting when LCD Connected

Customer was complaining, his iphone 4 would'nt start. When powered the phone without the touchscreen, it would boot and Itunes would make his thing. But my PSU showed the usage of maximum Ampere (limited at 1,2A) when powering on with an connected LCD indicating a problem with the LCD powering rails.

measured LCD_5V7_AVDDH with 1,2V insted of 5,7V

Multimeter showing a partial short to ground. So i started removing those caps one by one until the short disappeared. After the third cap with sucess. After replacing the bad ones, the phone was working again
[Only Registered Users Can See Links. Click Here To Register...]
gsm_anwar is offline   Reply With Quote
The Following 3 Users Say Thank You to gsm_anwar For This Useful Post:
.::GsmAriful::. (05-02-2015), Bakar_Siddeik (05-04-2015), gsm_kawsar (05-09-2015)
Sponsored Links
To see more of this thread, please login or register.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
WTS New iPhone 6s Plus 64GB Rose Gold (GSM) troyzin77 iPhone ,iPod & iPad (Apple Inc. Products) 0 10-07-2015 05:30 AM
Buy 2 units of Apple iPhone 6 Plus 128GB --@ $940 USD and get 1 unit FREE godfatherr101 Main Sales Section 0 05-20-2015 05:57 PM
Buy 2 Get 1 Free With Free Shipping: Apple iPhone 6 Plus 128GB--$470 Each godfatherr101 Main Sales Section 0 05-20-2015 05:56 PM
iPhone 6 and iPhone 6 plus review!! mmrozibul iPhone 6 / 6+ 0 04-18-2015 11:01 PM
What should we know about iPhone 6 and iPhone 6 plus ..::MOBILE MEDIA::.. iPhone 6 / 6+ 0 04-01-2015 06:31 AM

All times are GMT +7. The time now is 12:24 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
©GSMFORUMBD.COM All Rights Reserved. Designed & Developed By Tech_Support