How to check ic with multimeter
Hello. Iam using iphone 4s. My problem is the phone automatic switch on after connect batery. I already change the on/off ribbon and a new battery. And my problem is the home button also cant use even i change the new one. I think it have problem with the ic or somethig that control all that. How to test the ic if its have problem with the ic? How to know and how to check the ic?