HP Pavilion DV7-1015eg Power issue

[onlyprinzp]

Hallo everyone,

I have a problem with my HP Pavilion DV7 1015eg. The main problem is that when I press the power on button all LEDs blink for a split second and nothing happens. The LED on the power jack turns off aswell! I need to take out the adapter and hold the power button for 5 seconds put it back in and the LED of the jack lights up again. If i press the power button same happens, all leds light up for a split sec and nothing. When I connect the battery the charging led lights up and after 3-5s it starts blinking in 1Hz infinitly.

I took out the whole board from the case, took out cpu and ram too as well as fan heatsink and so on but still the same.

Edit:
I desoldered the PL702 due to the fact that it was shorting 0.0ohms on both sides. Found out the the one leading to "+NVVDDP" is short to ground. (Maybe it is supposed to I am noob sorry).
I also took off PQ701, PQ702 and PQ703 in order to test those MOSFETs but all where in good condition (drain wasnt short with source or gate)
In another post I found a similar problem and there the solution was a dry joint at PL3, took a look at it couldnt see any dry joint but resoldered it without any success.


Can somebody help me please?


I attached the schematics for my board: LA-4082P Rev: 1.0


Cheers and thanks in advance!

[piernov]

Re: HP Pavilion DV7-1015eg Power issue

Check the "VGA Core power" caps on page 20, you may have a shorted GPU. Make sure the resistance is indeed lower than 1ohm. A GPU power line will show a low resistance (a few ohm) even in perfect working conditions.

If you're lucky, it's only a shorted cap on this line. You'll need to inject voltage (less than 1V) on this line to find the faulty component. It'll be heating up.

[ktmmotocross]

Re: HP Pavilion DV7-1015eg Power issue

offcourse bad GPU. whole 8XXX and 9XXX is bad. whan u have short, the GPU is burn. replace it

[onlyprinzp]

Re: HP Pavilion DV7-1015eg Power issue

Hey piernov,

thank you for your reply. I am a bit noob, I put my multimeter on ohms autorange and put the sticks on each side. I tested it with C1098,C1099 and C1100 but it always says 0.0 like nothing.

I then took my dc power supply, put it to 0.9V about 3.5A, desoldered C1108 and attached the + to the board, attached the - to gound. Very strange is that I get 0.014V only when I measure both wires with my multimeter?

I really do not know whats happening?

[onlyprinzp]

Re: HP Pavilion DV7-1015eg Power issue

offcourse bad GPU. whole 8XXX and 9XXX is bad. whan u have short, the GPU is burn. replace it

How did you come to this conclusion please I want to learn and understand. This is not 8xxx or 9xxx it is 1xxx series.

Thank you

[onlyprinzp]

Re: HP Pavilion DV7-1015eg Power issue

*bump*

[salmanzeiad]

Re: HP Pavilion DV7-1015eg Power issue

plz i need bios for hp 455 g3

[onlyprinzp]

Re: HP Pavilion DV7-1015eg Power issue

plz i need bios for hp 455 g3

OMG why don't you open a new thread yourself and spam in mine?!

[salmanzeiad]

Re: HP Pavilion DV7-1015eg Power issue

OMG why don't you open a new thread yourself and spam in mine?!

i`m new user>>>and can not create new post!

[salmanzeiad]

Re: HP Pavilion DV7-1015eg Power issue

i`m new user>>>and can not create new post!

pic

[ktmmotocross]

Re: HP Pavilion DV7-1015eg Power issue

How did you come to this conclusion please I want to learn and understand. This is not 8xxx or 9xxx it is 1xxx series.

in your schematic is only NB9P-GS - 9600M GT,
or NB9M-GE - 9200M GS/Quadro NVS 150M

where u have 1XXX series?

[onlyprinzp]

Re: HP Pavilion DV7-1015eg Power issue

in your schematic is only NB9P-GS - 9600M GT,
or NB9M-GE - 9200M GS/Quadro NVS 150M

where u have 1XXX series?

Oh okey sorry I thought you were talking about the HP Pavilion model number.

Can you maybe explain short how you know this ?

[ktmmotocross]

Re: HP Pavilion DV7-1015eg Power issue

many of it reballed/replaced