How to Fix Dead Phone | PMU, LDO, VBAT, VPH Lines, Low Boot & High Boot

Hello everyone, how are you all? Welcome back to the channel again with new video. I hope all are you good and learn something new with day by day and thank you so much for giving love to this channel. Also God bless you all for your efforts for your hard work to learning this process a repairing journey. Right

now in this lesson we discuss about the dead phone diagnosis or dead phone troubleshoot because the many technicians stuck in a dead phone diagnosis. So in this video I'll give you something a good knowledge or something new or something important crucial. So take a pen and paper for the notes right. So let's say a dead phone

come to you right while in diagnosis what are the common steps each and every technician do the first basic common steps open the motherboard check on the battery connector let's say this one is the battery connector and front of you there is a motherboard right this is the battery connector the first step every

technician do take a multimeter in a diode mod and check on a VBAT line right now let's say in a Vbat you'll get a 350. Now in a reverse bias with the black probe on the VBT line and the red prop on the ground side the common testing after flip the props in a

forward bias let's say you will get oil or plus a,000 plus rating or right so that means according to the multimeter everything is okay there is no short circuit now I'll tell you something important now whatever fault comes in front of you there are two type of fault in circuits in a hardware. First of all,

a short circuit, right? Due to short circuit, your phone had a problem not turning on, network issue, audio issue, any kind of the issues due to short due to short circuit. Number one. Number two, a open circuit. Now what is short circuit and what is open circuit right? Let's say for example there are two type of the problems