Packard bell easynote SJ51-SJ81 service diagram

[pcbmaniac]

They gave me a HP laptop which not work's. When i press the power button, it powers up, the fan speaning but no screen and no battery charging led. Please i need service diagrams for this laptop.
Thank you in advanced

[pcbmaniac]

Re: Packard bell easynote SJ51-SJ81 service diagram

If it helps this is the mobo tec's:

Schematic PackardBell EN SJ51 (ORION A), SJ82 (ORION AP2)
Platform: FIC MTN70, PTB72
REV 0.4

[dj_ricoh]

Re: Packard bell easynote SJ51-SJ81 service diagram

reflow the chipset!
its amd and the video its on that chip

[pcbmaniac]

Re: Packard bell easynote SJ51-SJ81 service diagram

Thank you for reply. I already did that but now it wont power up at all.
I need the diagram to do some measurements because i noticed that no 3,3V and 5V exists now and before doing reflowing, the 3,3V and 5V and all other voltages came out only after pressing the power button. Is that correct? No 3.3V_ALW signals?

[dj_ricoh]

Re: Packard bell easynote SJ51-SJ81 service diagram

that voltage needs to be present!

what what what? does not power after reflow?

[pcbmaniac]

Re: Packard bell easynote SJ51-SJ81 service diagram

I will describe exactly what i did so far from begin:
I took the laptop in my hands and then...
1) With DC in and battery connected, i press the power button. The system power up, ALL LEDS are lighting, no lcd, no dvi output. I measure voltages at all inductors and found the 3,3V, 5V, 1.5V, 1,8V and 9-11V to battery.

2) I flow hot air to nvidia chip with temperature checking continously checked not to overtemp over 220C. I didnt put any flux though.
3) Waiting 5 min to cooling and then give DC in but no battery connected. The power button didn't manage to power up the system this time.
4) I put out the DC in, connect only battery and then press the power button and the system tries to power up for 2 sec's and then shutdown.
5) I measure for 19V DC and i noticed that it stoped before a green resistor.

That's all i have so far.
That's why i need the diagram.
TIA

[pcbmaniac]

Re: Packard bell easynote SJ51-SJ81 service diagram

Any help please?

[pcbmaniac]

Re: Packard bell easynote SJ51-SJ81 service diagram

Please anybody has this schematic to share? Thanks.

[ktmmotocross]

Re: Packard bell easynote SJ51-SJ81 service diagram

u fry that nvidia chip. it is shorted. chceck his power rail for short