Hp 470 G2 not turn on

[arber1232]

Hi everyone
I have hp 470 g2 not turn on zpl40/50/70
when i put charcher dc jack flashing orange light for 2 second and off
i check voltage i have 19.5 v and ADP_SIGNAL is 3,3v
i check first mosfet for shorts is ok
In bios i have 3.4v in pin 6 and 7
Can i help me ?

[mon2]

Re: Hp 470 G2 not turn on

Measure the voltage to ground of each pin of the 2*DCin mosfets.

Interested in the

Source (1-2-3)
Gate (4)
Drain (5-6-7-8)

Pin voltage measurements. Repeat for the 2nd DCin mosfet. Post all measurements.

[arber1232]

Re: Hp 470 G2 not turn on

Pq101
source=19,5v
gate=6.1v
drain=19.5v
pq102
source=19.5
gate=25v
drain=19.5v

[mon2]

Re: Hp 470 G2 not turn on

Post pics or topside markings of these measured mosfets.

Wish to confirm if one is a P-channel and the other is a N-channel type.

[arber1232]

Re: Hp 470 G2 not turn on



do you need schematic ?

[Vesko356]

Re: Hp 470 G2 not turn on

...

Schematic ---> https://www.badcaps.net/forum/showth...633#post678633

.