Packard Bell Easynote Hera C

[Ozito]

Hi

I have this PB Easynote that i need help with.

Info;

Packard Bell Easynote Hera C
MB: DAOPE1MB6D0 or HannStar J MV-4 94V-0 0830
I do find schematics that matches the components on the laptop if i use the first name. But they are not free and i do not completely understand them... yet.

Problem;
It won't power on with either battery or ac the only led i get is when the battery is in and the ac is connected, only then do i get a solid orange led.

But the battery doesn't charge and as mentioned the laptop won't power on.
I need help with how to diagnose this, where do i start?

I read another thread where the user had similar symptoms and the culprit seemed to be the power management controller, but that was Toshiba and the PWM controller was a max17435etg where as mine is a max8770gtl832.

It makes me doubt if it could be the same failing component in my case?

I appreciate any enlightenment and please tell me what else i can provide you with to make this diagnose easier.

Thank you for reading

[tomodachi]

Re: Packard Bell Easynote Hera C

I guess this one fits your mobo,

[Ozito]

Re: Packard Bell Easynote Hera C

I guess this one fits your mobo,

Thank you! I really appreciate it!
It seems to be my mobo, a lot of components on the schematic are the same.

On the last page i could read;

P31
PQ33, PQ39, PQ35, PQ36, PQ37, PQ38 change parts to solve shortage issue

Page 31 has the title CPU CORE and is showing just the MAX8770.
I believe the logic course of action is to test the "PQ" components?

Also on page 28 i can find the Power on sequence flow chart, after the power button comes "EC/87541". I don't know if that's a circuitry or a single component, is it something that you guys with more experience are familiar with?

I was thinking i could check it out (test it) but i don't know what I'm looking for.

Thanks again

[spidey]

Re: Packard Bell Easynote Hera C

it is embedded controller, and is a single component. it is the bigger component on the board after cpu/gpu and/or south/north bridge or a hub.

[Ozito]

Re: Packard Bell Easynote Hera C

it is embedded controller, and is a single component. it is the bigger component on the board after cpu/gpu and/or south/north bridge or a hub.

Thanks.

Is it possible to find some kind of schematic/diagram showing pin voltages and such?
Tried to Google but end up with the same pdf with the general description, features and dimensions.

Or shall I just proceed buying a new one and see the results?

[spidey]

Re: Packard Bell Easynote Hera C

check page 27 of schematic posted by tomodachi.

[Ozito]

Re: Packard Bell Easynote Hera C

Thanks spidey.

I didn't think that EC/87541 and IT8512 was the same IC.

Observing the flow chart, I believe NBSWON should be what I will be testing first?

[ctlab]

Re: Packard Bell Easynote Hera C

thanks for your support