Samsung Galaxy S6 Black Screen AFTER Splash

Hello,

First off, I will mention that according to the customer, this is a water damaged phone, though it was only for 5 seconds.  I have disassembled it and cleaned all the connections.

Now, I get a Splash Screen, but then it goes black.  The blue light in the upper left hand corner keeps slowly blinking bright and not bright, so that seems to be working.

I have factory reset the phone on the phone, wiped the cache, and used ODIN to reload the phone.

The screen displays just fine and all the buttons work when going to the options like update from ADB, wipe cache, etc.  There seems to be nothing wrong outside of the OS but as soon as it goes past the splash screen when you are trying to boot it, it's just black.

Oh, I did have once when restoring it that it was optimizing apps and stopped at the end.  I have ODIN'd since then.

This is a Verizon Galaxy S6
LVL 8
Scott ThompsonComputer Technician / OwnerAsked:
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Jackie ManConnect With a Mentor Commented:
The info below may be useful.

"The fact that you’re seeing a blinking blue light means that the phone is actually on, although, it may have been frozen up. The most common cause is system crash. To bring the phone back to life (this isn’t a permanent fix) is to press and hold the Volume Down and Power keys for 20 seconds to perform the simulated battery disconnect. After this, the phone should turn on provided there’s enough battery to power it up. However, there’s a chance the problem will come back so you need to be really observant to detect a pattern or notice what triggers it. Performing a master reset may fix the issue."

Source: http://thedroidguy.com/2015/10/samsung-galaxy-s6-edge-wont-turn-on-or-boot-up-not-charging-blue-light-blinking-other-power-related-problems-1050166

Water damage is difficult to fix.

If still no go, it might be related to the system gets stuck on some system check codes and the main board does not give the feedback required and the system just get frozen,
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JohnConnect With a Mentor Business Consultant (Owner)Commented:
My guess, having had a water damaged iPhone myself, is that it is junk .
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Scott ThompsonComputer Technician / OwnerAuthor Commented:
It's very possible, and the customer is willing to pay up to $400 to fix it, so motherboard replacement could be an option.  But, I need to figure out exactly what's going on before I just order random parts too. :)
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JohnBusiness Consultant (Owner)Commented:
Apple replaced my iPhone 4s with a flat charge of $199 out of warranty cost.
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Jackie ManCommented:
Also, does you hear any beep sound when you press volume up and down buttons when it is blinking for about 5 minutes?

If yes, the phone is actually turned on and only the AMOLED display or the connection of the display to the main board is damaged.
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Scott ThompsonComputer Technician / OwnerAuthor Commented:
Hello,

There are no sounds coming from the phone when it is on.  My guess would be what you posted.

"If still no go, it might be related to the system gets stuck on some system check codes and the main board does not give the feedback required and the system just get frozen, "

So, motherboard replacement would be the next option it sounds like unless there is a way to determine what code it's failing on.
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