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I tried with DFU mode, but the image of the DFU is a padlock tried the restore but I get this error com.apple.MobileDevice.MobileRestore – 0xFA0 (4000)]

Yes in fact I disconnected the battery when it comes to the story, I have no information, the machine presented this type of defect all of a sudden, now I try with another external monitor, could it be in DFU mode?

I inserted a na usb pen and there is usb activity, the caps lock responds when it is pressed but I don't even have video with an external monitor, and the fans run fast

I tried to disconnect lcd, but nothing, the fan turns but no video

Hi I have this machine with the black screen, usb meter goes to 20v and reaches 1.56 A caps lock makes the green light the screen remains black, I tried an external monitor but nothing. How can I proceed?

PM_PWRBTN_L remains stable on 3.3v

The card initially had a short on pp3v42 due to u7941, solved 3V3_S5/SUS arepresent, on q7221 ho p5vs3_en_l 3.3v

Hello I have a 820-3115-b with green light no fan spin ppbus_g3 12.55, from which I don't get PP5V_s3

So I have to understand why when I insert the jack it reaches 4.5V which by the way must remain at 3.3 right?

I measured AUD_IP_PERIPHERAL_DET with the 4.5V mi inserted headphones and with the headphones not inserted 3.0V but the system shows me only the earbuds as output

With the preferences open I tried to disconnect and reconnect but nothing remains unchanged this with two different lio tabs

Yes, just the headphones nothing else

I also tried to change the LIO board to another is another flex but the result is the same. The boot sound does

Hi in this card I encountered a strange problem, as OS X audio output gives me the headphone jack alone, I don't understand what the problem is and where to start, I just did the pram reset

So the CPU is gone? I started from a black screen with three beeps then this situation

I have a problem with this card, it presents the classic problem of graphic artifacts due to ram, I reballed much of the ram but I just mitigated the problem after about half an hour of operation under stress, the artifacts reappear, how can I check the memories and figure out which one fails?

L9080 had no continuity I replaced it and now it works regularly. Thank you

The board suffered liquid damage mainly on PPVOUT_SW_LCDBKLT, which corroded the tracks and also the pins of the lvds cable I replaced the lvds connector and used a 2010 model cable but on PPVOUT_SW_LCDBKLT I get 24 V only the led on the back but LCD does not display anything even the white...

I checked SMBUS_SMC_5_G3_SCL and SMBUS_SMC_5_G3_SDA with the oscilloscope there is communication, so SMC should be ok now I try to replace the dc in and then I try with U7100

When it enters the operational theme if it tells me that the battery has 86 cycles, can it also depend on a bad welding of the SMC?