HP Envy 15-U493DL Charging light on, No power on

[computersbyterry]

I have an HP Envy Motherboard 15-U493DL
DAY62PMB8E0 When Charger is plugged in the light goes on. When the power button is pressed nothing happens.
Mosfet 1
G 17.5v, D 19.5v, S 19.5v
Mosfet 2
G 25.9v, D 19.5v, S 19.5v
Mosfet 3
G .87v, D 19.5v, S .85v

@ 1st mosfet there is I think a Diode 19.5v Right and Left is 0v

The 1st Coil is 0v
The 2nd Coil is .85v (should be 1.3v for memory)

The last 2 mosfets below coil 2 are as follows:
Mosfet 4
G .85v, D 19.5v, S .85v
Mosfet 5
G 0v, D .85v, S 0v

All other Coils on board are 0v

There is an IC next to the 1st coil that has 3 0v and 3.3v, 5v and 19.5v as listed

Is there anyone who can suggest what is wrong here?

If someone has a schematic I would appriecate it.

[SMDFlea]

Re: HP Envy 15-U493DL Charging light on, No power on

Schematic + Boardview https://www.badcaps.net/forum/showthread.php?p=948174

In future please ask for schematics in the Schematic Requests section.

[ktmmotocross]

Re: HP Envy 15-U493DL Charging light on, No power on

that "memory" coil looks more like battery charging coil for me and .85V on it will corespond to not connected battery

[mcplslg123]

Re: HP Envy 15-U493DL Charging light on, No power on

Everything seems fine with your measurements. Power button has 3V?? Pressing it goes to zero?? Tried cmos reset?? Flash bios.

[computersbyterry]

Re: HP Envy 15-U493DL Charging light on, No power on

Thanks for the help. Memory coil was battery so it is ok. Yes the power button goes to zero. I can try to find bios file and flash. Im thinking IT8987 (super I/O) chip may be culprit. I will try to check the voltage there