hp dv6 core2dou.. no power help

[tedtones2600]

I have a dv6 1205ee... problem is stanby light is but no power fan not spinning... problem hapend when im installing keyboard powered on then shuts down something shorted somewhere cant find no burnt component... ive checked 19v and power button but theyr ok... check some 8pin mosfet it shows 2.5v... tried discharging the board powering on with power unplugged

Help im stuck in here

[fester]

Re: hp dv6 core2dou.. no power help

you probably fried kbc

[tedtones2600]

Re: hp dv6 core2dou.. no power help

Image

[tedtones2600]

Re: hp dv6 core2dou.. no power help

you probably fried kbc

If controller is fried the unit should still be running

[fester]

Re: hp dv6 core2dou.. no power help

you must firs meassure if you have +5V and +3V ALW lines present after inserting power adapter.they are created in PU2,you can meassure it on coils PL8 and PL9.schematic in attachment(i think is the same model)

[tedtones2600]

Re: hp dv6 core2dou.. no power help

Ive checked mosfet me4410 s911, it is shorted both sides using ohm meter.. did i checked it right?

[fester]

Re: hp dv6 core2dou.. no power help

this is for cpu 1,5V,you must check it when is cpu out of socket.but this is not important now

[tedtones2600]

Re: hp dv6 core2dou.. no power help

Theres 4 coils no voltage coming out with adaptor plugged

[tedtones2600]

Re: hp dv6 core2dou.. no power help

Sorry one coil reads 2.5v

[fester]

Re: hp dv6 core2dou.. no power help

you must find exact these two, PL8 PL9 and meassure there,i dont see the marking on your photo.if is no voltage there then check PQ55 PQ47 and PQ49 PQ50 for short.

[tedtones2600]

Re: hp dv6 core2dou.. no power help

Thanks for you time sir... pl8 and pl9 dont have voltage coming out... pq55 and 47 is near pl8 and pq49 50 near pl9 ive checked those and 4 mosfets theres no short

[tedtones2600]

Re: hp dv6 core2dou.. no power help

Pl7 has 2.5v and pl12 has 0volt

[fester]

Re: hp dv6 core2dou.. no power help

ok,you have no ALW voltage present,now only find out why :-)
try to meassure pin6 on PU2(i attached datasheet for this ic to see whitch pin is that).if you have voltage here(around 19V)then replace this ic and your laptop shoud start normaly

[fester]

Re: hp dv6 core2dou.. no power help

And bevare of shorts in this area :-)

[tedtones2600]

Re: hp dv6 core2dou.. no power help

Pin6 of pu2 reads 2.48 volts

[fester]

Re: hp dv6 core2dou.. no power help

and on pin 5,6,7,8 PQ49?

[tedtones2600]

Re: hp dv6 core2dou.. no power help

and on pin 5,6,7,8 PQ49?

Theyre 2.44volts

[fester]

Re: hp dv6 core2dou.. no power help

ok now find and meassure PR61,is somewhere close to dc socket,both sides,if you have the same voltage(2.5V) then PD5 both sides

[tedtones2600]

Re: hp dv6 core2dou.. no power help

Hello sir cant locate pr61.. but pd5 3sides has 19.80volts

[fester]

Re: hp dv6 core2dou.. no power help

it is power sensing resistor with walue R020,i think i see it in your first photo