820-01700 not booting

[Kyle93]

So in this case it’s either a bad U7100 or CPU?

 

[2informaticos]

Or U4710...

 

[Kyle93]

Replaced U7100 and U4710 but no change

 

[Kyle93]

CPU replaced. L7211/21/31 is now 0.300v-0.520v fans spin but still no caps lock light or screen activity. Completed DFU restore successfully.

This board came with a i9 but it was replaced with a i7. Do any resistors need to be changed when changing to a different CPU?

 

[2informaticos]

Any CPU configuration strap should be mentioned in the schematic.

 

[Kyle93]

When I search CPU strap nothing shows up in the schematic. Do I need to use different wording to find it or does this board not have CPU configurations strap?

 

[2informaticos]

CPU configuration is shown on page 6.
Page 132 (BOM) also mentions something about various CPU types.
You should check the configuration of the MLB where you took the CPU from.

 

[Kyle93]

The CPU is a i7 2.6GHz going on a board with 64GB ram 1TB SSD and 5500M GPU.

How do you tell which resistor configuration this is based off the two pages??

 

[2informaticos]

Schematic alone probably doesn't help.
Check the CPU's donor board configuration.

BTW, what is CPU core behavior?
It should drop from 1V to 0.6V aprox.