PL7401 - 1.8V
PL7402 - 0V (12.9 Ohms)
PL2101 - 1.09V
PL602 - 3.3V
PL601 - 5V
PL1401 - 0V (137 Ohms with RAM installed )...

I have changed PU1401 as a lucky guess as it's making 1.2V, but it's still acting the same, even a little worse, it doesn't boot anymore now, it just draws 0.034A from my bench supply, clicking power button doesnt change the amp draw. Is there anything I can check?

ACOK - 3.2V
ACDET - 2.7V
REGN - 5.9V
VCC - 19.7V


PQ201
Drain - 20V
Source - 20V
Gate - 26V

PQ202
Drain - 20V
Source - 20V
Gate - 26V

Earlier I have measured PQ601 and PQ602
PQ 601
Drain - 20V
Source - 3.3V
Gate - 3.3V ( was 3.7V when it "booted" to no boot option menu)

PQ602
Drain - 3.3V
Source - 3.3V
Gate - 0.19V ( Was 1.9V when it "booted" to no boot option menu)​

Hey, no even without SSD it doesn't boot everytime, but when it boots, it doesn't crash like it does when SSD is in. It boots if I turn off power supply for around 20mins.
I haven't found any shorts, there's a lower resistance around GPU/CPU/RAM but it is not shorted.
I am missing 1.2V on RAM inductor, that shows ~120 Ohm with RAM installed.
3.3V coil = 4k Ohm (when I first touch the inductor it shows ~17k and goes down)
5V coil - 11.3M Ohm
battery coil - over 3M Ohms
1.05V coil - 56 Ohms

When there's no boot (0.034A) BIOS chip gets 3.3V on leg...

Hello, I got a problem with my Lenovo Legion Y50-17IRH, motherboard model fy710/fy714 NM-C531 Rev 2.0

I cannot get it to boot, the white power led lights up for 10-12s, and then resets, it's unable to make post. When I power the motherboard with power supply, it draws 0.034A and there's missing 1.2V on coil.
It randomly boots, usually after removing the power supply and waiting 20-30mins, it boots, but only without SSD installed, it shows that boot failed, and when I got SSD connected, it just shut downs after 10-15secs into post.
When it shut downs, or I press power button...

Hey, the bios technically works fine, was able to boot finally, but my laptop is still not working perfectly, and im not sure if that has something to do with BIOS or not, it can only boot once, if I turn the laptop off (was able to restart), I cannot power it again, the power led will stay white for about 10s, and then goes dark and tries to boot over and over again.
Sometimes removing battery and cmos battery for 20-30mins makes me able to boot again. Also the keyboard was working only within the first boot, if I restart the laptop the keyboard just stops working. Also I have got bluetooth...

Hello, I have a problem with my laptop, it wasn't booting/showing anything on the screen. I have found another bios in the internet, and switched ME Region, it boots now, displays on the screen, I can see that circle from booting, but after around one "loop" it just freezes. Think that still might be an BIOS issue, and the one I made just isn't working properly.
Could someone please make me a proper bios file so I can hopefully boot my laptop ?

Lenovo y540-17IRH Bios
S/N PF1BLV1R
Model name: 81Q4
MTM: 81Q400DLPB...