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[mcplslg123]

Resistane to GND on PLA1 will be quite low and thats normal. Problem is shorted PQA1.

Very likely end of story as cpu is fried.

[mcplslg123]

Try replacing the crystal+ caps connected to it. Look for corrossion.

[mcplslg123]

Known issue. Its dying ATI HD5470.

Dont waste your time on this mb.

[mcplslg123]

Current Sensing Resistor=CLR

Its usually located after 2 dc-in mosfets. Alternatively you can measure resistance to GND on pin5-8 of 2nd dc-in mosfet.

No power should be attached while measuring resistance.

[mcplslg123]

SRN/SRP voltage perhaps indicate a dead battery.

[mcplslg123]

With only usb-c adapter connected, it is stuck at 5V-so definitely you have problem in PD controller/its firmware/charging circuit.
It should negotiate to 20V with adapter only.

[mcplslg123]

So now volatge on charging coil is stable at 8.6V? If yes, thats a progress.
PCH_RSMRST# is still pulsing or is it stable now?
Btw, 8.6v as main rail may be correct as seen this type of volatge in many mb's.

[mcplslg123]

Whats the resistance to GND on CLR?
Seems like main 19V rail is shorted.

[mcplslg123]

In absence of schematics,always do basic things

01.Observe the mb for corrosion/liquid spill etc under scope
02.Check dc-in mosfets voltages and whether 19V reaches CLR
03.Voltage on charging coil(should be 13V or similar approx as NVDC is being used very likely
04.Check whether 5V/3V is generated or not?
05.Check PS_ID is present or not.

[mcplslg123]

Note the difference in suffix BXA & CXA and then the size 192KB /256KB. So very likely wont work.

On NM-D563, ITE ec will auto program if its blank.


Try this trick. Open the EC file in hex editor and select all and autofill it with zero. This way we're creating a blank ec file of 128KB. Now flash the EC with this file. this will make your EC blank.

99% chance your programmer will not give error when flashing blank ec file.

Now apply power and it should auto program itself on 1st boot.

This trick helped me on lots of ITE...

[mcplslg123]

Should 've mentioned mb markings and link schematic to get proper response.

This has nothing to do with win11 update.that may be a mere coincidence.

[mcplslg123]

De-solder PLA1 along with mosfet connected to this coil and check whether short is gone or not on main rail?...

[mcplslg123]

I already said its woth trying a new LV Ic.

[mcplslg123]

TPS22966 or similar will do. This is just for dc-dc transfer.

[mcplslg123]

Most of the lenovo mb's will program ITE ec on 1st boot on its own as long as EC is blank.

[mcplslg123]

IT8517E is not programmable and usually has an external eeprom for this purpose.

[mcplslg123]

Desoldering the ram-this step was un necessary....

[mcplslg123]

This a gaming laptop-so will generate a lot of heat. not unusual.

[mcplslg123]

Very likely yes.

[mcplslg123]

Hold on guys before jumping to order these mosfets. have you checked the resistance to GND on CLR located just after these dc-in mosfets?

I beleive it'll show short to GND. Adapter is no more shorted 'coz you removed the mosfet.

So do check whether your 19v rail is still shorted or not. Else the new mosfet will get shorted again.

Usually whenever, +19V rail gets shorted, the dc-in mosfet also gets shorted. So i beleive your +19V rail is still shorted.