Thank you very much for the diagnostic help and possible solution!
I guess it will be best for me to order preprogrammed chip, since I wouldn't use the programmer enough.
Did you ever order from someone who you could recommend?

Thanks...

Sorry to ask over and over but I have very little experience with repair like this, and watching YT will give you only very little details.

When I injected 1V to the VCC3SW it takes about 400mA (my limit was set to 1A) The IT8227 temperature was about 27C and this was the only component on the board that warmed up.
Injecting 1V/1A to the VCC3M it took only 32mA and nothing was getting warm.

Can someone please experienced tell me if this does mean something?

Thank you folks!

Now with the voltage regulator chip removed, is it safe to inject some voltage on the LDO pin 5 to see if there is anything burning?
I did check all capacitors on the board but didn't find any dead shorts, only the 1.9ohm everywhere on the VCC3SW line.

Thanks

Thank you!

Oh, Ok, I thought it will be some kind of removable jumper
Chip is out, now there is 48ohm resistance on the PL0501 inductor, 48ohm on pin4, but still only 1.9ohm on the LDO pin 5

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Much appreciate your time trying to help!
I'm unfortunately unclear what the pr0506 marking means since it's not marked on the board it self.
Is it the jumper that is connecting board layers I marked on the pic on pin4?
Would heating it up and using solder sucker to remove it work?
Thanks

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I took it step further and injected 2.8V/0,9A to the 3V rail and the PCH gets slightly warm (thermal cam pics) and the 3.3V chip still lights up like a charismas tree in the same corner.

[ATTACH=JSON]{"data-align":"none","data-size":"small","data-attachmentid":3624354}[/ATTACH] [ATTACH=JSON]{"data-align":"none","data-size":"small","data-attachmentid":3624355}[/ATTACH]I took it step further and injected 2.8V/0,9A to the 3V rail and the PCH gets slightly warm (thermal cam pics) and...

I just compared to the 5V power supply chip, and that one even with 0V on the coil still provides 5V on the LDO pin also resistance measured on that coil is in kohm range unlike the 6ohms on the 3V coil.

Thank you very much for your reply!
I attached schematic in that area with measurements (when I shorten my multimeter leads the meter is showing 0.2ohm)
When power is applied there is 0V on the PL0501 inductor and 0.3V on pin 5 LDO
The other pic is the chip it self with marking of the area where it starts to burn hot.

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Hi there, did you manage to find what was the problem? Facing the same issue on E15, same PU0501 chip is getting very hot.
Thanks

Hi there!
Did you figure it out?
I have short on the RFCPB chip (pin 7, the corner gets hot) but I'm not sure if it's faulty chip (3.3V power) or somewhere further.
Any help would be appreciated....