MacBook Pro 820-2915 no backlight

[ligym60]

Ok when I received this Mac it had no chime and mouse connected did nothing
I looked over cpuvcore and restored it. There was work done and a few joints weren't soldered well. No I have a issue with the onboard audio and no image
I plug a mouse in and it now blinks. Im looking at the schematic and see u9000 gets power from r9094 and r9094 gets powered by q9607.

L9000 0v
R9094 0v on both 1-2
Q9607 on en I get .3 v is one of these internally shorted ?
R9676 :
pin 1 pp3v3= 3.3
pin 2 gmux_s3_pd_en =.3v
C9010 0v on both pins
All_sys_pwrgd 3.3v

I thought since the onboard speaker wasn't working it might be the 3.3 power rail
Might have a issue but everywhere I search for this rail it's good. Please if my diagnoses is off please let me know. thank you everyone

[piernov]

Re: MacBook Pro 820-2915 no backlight

820-2915 = dead GPU.
Not sure why would someone mess around CPU VCore though.

[KvnTM]

Re: MacBook Pro 820-2915 no backlight

820-2915 = dead GPU.
Not sure why would someone mess around CPU VCore though.

Dear god I never want to see this board in my life again... I've done two UMA conversions on those. I'll never touch them again

TLDR:
Not worth your time. Unfixable.

[ligym60]

Re: MacBook Pro 820-2915 no backlight

Yeah it’s a nightmare :/ but I will go back to it when I have time it’s the sweetest torture

[ligym60]

Re: MacBook Pro 820-2915 no backlight

Ok so the backlight is working know. But I think I have a sensor issue track pad works with clicking but no swipe keyboard works if you press same key several times WiFi not working at all any suggestions?

[ligym60]

Re: MacBook Pro 820-2915 no backlight

So I’m looking for AHT download
http://download.info.apple.com/Apple_Hardware_Test/ This link doesn’t get me to download
Does anyone have a copy ?

[piernov]

Re: MacBook Pro 820-2915 no backlight

You want ASD 3S144 or 3S148 not AHT, ASD provides more information. (it's not distributed by Apple since it's their internal diagnostics software but you can find it on the web)

[ligym60]

Re: MacBook Pro 820-2915 no backlight

Ok I’ll keep looking

[ligym60]

Re: MacBook Pro 820-2915 no backlight

Well the WiFi issue was the cable 821-1311a one of the pins damaged. And the keyboard I saw it when I first opened it has a hole so I think someone burned the keyboard even though backlight still works. I’m ordering a new one. As for the trackpad I just don’t know as of yet

[protocold]

Re: MacBook Pro 820-2915 no backlight

I searched for ASD 3S148 for a few days now with no luck. Does anyone got any hint?