OPPO R831K No Display Solution

Due to water damage this OPPO R831K has black or no display. Below is an image of OPPO R831K No Display Solution.

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OPPO R831K Shorted No Power Part II

It's another shorted board OPPO R831K due to overcharging. And as I have said on my post, Samsung J100ML/DS Shorted No Power Solution that not all shorted have the same solution. Like my older post on OPPO R831K shorted. 

This time I use the method on how to solve Samsung J100ML/DS Shorted No Power. I also use my power bank and put lacquer flow on the board. As I've expected again, I did determine the faulty component 'coz the faulty component has been boiled/burst out. Or should I say, melt? Whatever!

Just see images below. Replace it and problem solve!

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OPPO R831K Shorted Solution

This is an OPPO R831K water damage unit. I checked it and the board was shorted. It has many corroded parts. Just remove the capacitor C1838 that is connected in Vbat_PMU with respect to ground as shown on the image below.

remove C1838

After removing the capacitor, the shorted was gone and the unit can now power on.

DOWNLOAD OPPO R831K Schematic Diagram

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OPPO R831K Can't Power On

I have now this OPPO R831K, the customer said it doesn't powered on, but it can be charge. The first things that comes to my mind is a faulty switch. I dismantle the unit. Check the flax switch most especially the membrane. Maybe there's a corrosion at the bottom of the membrane. But there's no corrosion. Next step is connection checking. I checked the connection from both side  of the switch going to the 2 connection that will be connected to the board. I found out that the other connection is open. So what are we going to do with that? Just apply a jumper, and problem will be solve.

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