HP ZBook 17 G3 wont boot

[mr.Data]

When I turn on the ZBook 17 G3 all light go on but I got a black screen en no sign of life.

Then after a few seconds the charging light starts blinking 10 times. The other light go out. The charging light blinks another 5 times and the laptops shuts down.

I got a full battery and tried with the charger as well but got the same issue.

Any suggestions?

[mr.Data]

Re: HP ZBook 17 G3 wont boot

When I take out the bios battery and the GPU the ZBook seems to be rebooting and the fan spins one time every now and then.

The CPU does not get hot. Should I suspect a broken CPU?

[peste]

Re: HP ZBook 17 G3 wont boot

what voltages did you measure? 19v, 5v, 3.3v, etc., give us more details.

[radegoub]

Re: HP ZBook 17 G3 wont boot

Hello, I have this problem with an hp zbook 17 g3 laptop. It does not turn on.
the power button LED stays on, not possible to turn it off by pressing the button and I have 5v at the button.
sorry for my poor english, i am french.
please i need help.

[radegoub]

Re: HP ZBook 17 G3 wont boot

please can you help me , I have 5v at the power button

[radegoub]

Re: HP ZBook 17 G3 wont boot

hi i look for help please, my laptop won't boot and i have 5v on the power button, what could cause that

[mon2]

Re: HP ZBook 17 G3 wont boot

Hi @radegoub.

Can you post any markings on your logic board ?

Any history of this unit ? Liquid damage ? You are using the original power adapter ?

[radegoub]

Re: HP ZBook 17 G3 wont boot

Hi @radegoub.

Can you post any markings on your logic board ?

Any history of this unit ? Liquid damage ? You are using the original power adapter ?

yes of course, the motherboard is an APW70 LA-391p Rev 1c, no trace of liquid, all voltages are good, well I think.
the charger is a 200w hp, but I don't understand why I have 5v at the power button.

[mon2]

Re: HP ZBook 17 G3 wont boot

Trying to locate the schematic for this unit but the general starting base is to check as follows:

Remove all power.

Meter in resistance mode (2k scale is good)

Check the resistance to ground for each coil (often grey in color) to ground.

Looking for any low resistance readings.

If found, post the coil location with silk screen markings if known. The coil could mean a defective power rail due to a failed capacitor (shorting).

[radegoub]

Re: HP ZBook 17 G3 wont boot

Trying to locate the schematic for this unit but the general starting base is to check as follows:

Remove all power.

Meter in resistance mode (2k scale is good)

Check the resistance to ground for each coil (often grey in color) to ground.

Looking for any low resistance readings.

If found, post the coil location with silk screen markings if known. The coil could mean a defective power rail due to a failed capacitor (shorting).

I forgot to tell you that the charging light comes on when you plug in the charger, the battery light flashes orange (even though I don't have the battery) and the power button LED lights up dimly.
I must also specify that I flashed the bios main and EC (no change)
I took the measurements of the coils, resistances and voltages,

PL7 13 Ohms
PL8 70 Ohm 0.9V
PL11 164 Ohms 0V (1.35V I guess)
PL33 34 Ohm 0V
PL37 0L 0V (charging coil)
PL39 0L 3.3V
PL40 0L 5V
PL42 0L 1.8V
PL44 0L 0V
PL47 2 Ohm 0V
PL48 5 Ohm 0V
PL49 2 Ohm 0V
PL50 5 Ohm 0V
PL51 2 Ohm 0V
PL59 0L 19V
also I remove the mxm card before measuring
Thank you for your help