820-3330 no video

[2informaticos]

Did you test for external video.
Instead of mouse, test with OSX pendrive; if flashes, there is USB activity for sure.

"GPUVCORE_PGOOD at 3.3V"
That means GPU power supply works good.

Post some voltages at J9000; correct LCD plugged in, of course...

 

[jadao]

Yes I tested with external monitor, it doesn't work.

However I am sure there is activity,, it chimes, I can PRAM the board with external kbd.
I also see flashing activity with my usb live os hdd,
When I boot holding option key, I can see Caps Lock key light on.

Voltages on J9000:
PP3V3_SW_LCD=0V I am missing LCD_PWR_EN = 0V

Thanks

 

[2informaticos]

Try this dump as is, don't change ssn yet.
https://drive.google.com/open?id=1F3ubzLhVcyu81ErPQWQEqhljC8RuJDmM
I cannot assure is good, as I got it from vinafix...

 

[jadao]

Hi 2informaticos, thanks for the dumps I downloaded it, but I can't open the compressed file, it seems broken.
Thanks

 

[jadao]

Sorry, for some reason it’s missing a line,
Since I can’t open your dump, the compressed file is reported as corrupted (maybe it’s my win xp system , I’ve downloaded from Vinafix a bios to test. They had a 8MB version and a 4MB.
I just took a standard 8MB version.

 

[jadao]

So I tested another bios (with no warranty wether clean ME or not) and samed thing...
it chimes, it's able to PRAM but no image/backlight...
Any suggestiona? Thanks

I notice also fans doesn't ramp up due to missing trackpad, it just run quiet as if trackpad was connected??

 

[jadao]

Any suggestion about this one before I give it back? Thanks
Don't know if on this model fan ramp up progressively to maximum when trackpad is disconnected… I think it should if TS0P is located on the trackpad…
I don't know if this is most likely related to bad ME region or other additional issue...

 

[2informaticos]

No external video discard a problem with internal LCD.
You must have a GPU related issue.
Change U8900, just in case...