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Dont you get any LDO from MPMU?

An o-scope can show if there is activity at least.

L6960 voltage jumping with R6934/5 removed?

If no important data, try restore option.

Not an easy job. All power lines appear on pages 147-141. Did you check all M/SPMU LDOs too?

Not sure, R7702 establish some current reference for the SPMU; it may be important. If you have working board, you can check what happens if that resistor is removed.

Check U4802 signals, with lid open/closed. Use magnets to simulate the lid position...

Check diode mode to ground on all secondary power rails; compare with good board, or reference table. Start with LC260.

If no important data, try DFU restore few times. Sometime need to try several times, until completes successfully. Connect the battery and trackpad.

You can measure R6970/6 onboard. R6971/2 can be properly checked only disconnected from the circuit. You should solder one pin on some pad on the board, leaving the other pin "on air". Is the safest way to check them in ohm scale; completely removed from the board, you can easy loss them. Also...

Maintain R6934/5 out; post again U6960 voltages. Is R6900 really good (0 ohm)?

At least one screen should be good. I suppose/hope you didn't touch video connector with each screen connected. The big problem is that usually CPU is the one affected in this case. You are not the first one with this problem.

I can only suspect bad GPU in this case...

Did you check the 4 resistors above mentioned? If all good, replace U6960. Just in case, check first if R6900 really has 0 ohm...

This signal comes from T-CON board. CPU can't recognize internal display. You should try known good LCD assembly. Be aware, do NOT connect Intel screen; A2159, or A1706/8 screens can kill the CPU.

R6934/5 both removed?

OK, then 3V3/5V_SW_LCD should be present too. You can check them on the filter capacitors. Now check LPPD_INT_HPD voltage; RP611 is a good test point.

Use the name of the line and find proper test point. If no other component with easy access is connected, try to identify the line and scratch a bit on it. In this case, just check UP701/10 outputs. If you get correct voltages, then enable pins are correctly driven. When you check voltages...

Why would you want to check in diode mode (to ground) the pins connected to ground? "For pins 8,18,28 and 38 and pins ... 11 ... i check for voltages" What voltage do you expect on grounded pins??? Put some logic on your job. Your readings look close enough to expected values in diode mode...

Really important pins to check are 2, 4, 6, 24, 26, 45, 46. Pins 8, 18, 28, 38 are connected to ground; through RP674-7. No reason to check GND to GND in diode mode, nor ohm scale. If good in diode mode, then check their voltage. "check if UP710 has correct outputs signals (4, 11, 14)" I...