HP Probook 450 G7 / DA0X8MMB6D0 rev.D - No power

[OneLiberty]

Hi everyone,

I've finally decided to post on the forum.

The laptop is a 15" HP Probook 450 G7 and mobo is the DA0X8MMB6D0 rev.D

I've spent quite some time on this laptop trying to fix it, but i'm just running out of ideas.
There are no sign of power (no charging light).

I'm not a pro or anything, just trying to learn and I'm a bit lost with this one. I tried following the 19V and checking for other voltages, but i've only found the 19v.
Visually nothing, no sign of water damage or anything like that. Nothing seems hot when plugged in.

The power supply is a known good one. I'm not entirely sure about the battery, but the measurements seems ok-ish (little low on voltage, but i think it's because it's not charged).

I thought about the bios but i feel like i should at least get a light even if the bios is corrupted right ?

mobo has two bios chip :

1. MX 25L12872F (below the WLAN)
2. 25B127DSIG (to the left of the RAM slot)

Any help would be greatly appreciated.

[rogfanther]

With all power disconnected, measure resistance to ground of all coils.

[OneLiberty]

Thanks for the answer, here are the values :
I don't think i missed one, the last 3 where quite hard to measure as the values was going all over the place, so take the values with a grain of salt.


I'm guessing i should check near PL9201 then.

Also i used the QUANTA XM8-D (BDV) Boardview file for references.