bargo
Member
Last Activity: 08-24-2024, 02:33 AM
Joined: 08-09-2022
Location: Eifel
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Yes as I guessed its not actually logical, just go for another round of batteries and both logic boards are working again just in their full clocks as normal.. -
This version above is not recommened, the ME region is not very clear and causes a slow chime and other bad stuff. But at least I managed to get my mainboard to trun for the first time using it, now I will post a better version soonLeave a comment:
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I will do so, seems to be relevant but both logic boards with the same issue, only on OSX...Leave a comment:
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The osx loads fine in my case, its not stuck, but its very slow clokcing at half default base clock of 1.6ghz so its clocking at 800mhz always
I have identified one reason for the Performance throttling and it seems to be due to this thing [B]"GPU LIMIT GTDRIVER" [/B]according to powermetrics
Whats more interesting I could not find any search engine result with that matched string "[B]GPU LIMIT GTDRIVER[/B]"The osx loads fine in my case, its not stuck, but its very slow clokcing at half default base clock of 1.6ghz so its clocking at 800mhz always...Leave a comment:
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Right now I have this [B]820-00165-A [/B]and another brother [B]820-00165-A [/B]logic board both working on the same level.
I have a problem with both logic boards that could be due to something I don't yet know. They pass all Apple diagnostic with ADP000 result which means no errors were found. When I boot into OSX on Big Sur or later Monetery, I get a very slow machine, the speed of the processor on both logic boards are constantly at 800Mhz according to the powermetrics.
I then booted into Ubuntu for both logic boards the processor speeds were changing according to...Leave a comment:
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820-00165
I used this 1466 bios specifically for my mainboard, the previous serial number had only three or four differences
Replace XXXXX serial number with your serial number.... -
The good thing is that, now I know all the stuff are working, because they were successfully initialized by linux drivers, including wifi/bluetooth, keyboard USB. I just need to get the correct bios.
Oh man, I have a chime now
apparently this guy is good to go for a round of testing
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No its the opposite the earlier failed bios attempts were all for the correct bios and logicboards according to the posts i found for that logic board in the title, but the wrong bios worked.Leave a comment:
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ok i was wrong that CPU is actually[B] Core i5-5250u [/B]according to linux, so it must have been examined otherwise by me, but now with macpro 12,1 bios the machine works, like most of the important things work, other than it thinks that it has 16gb while it have 8gb.. Any good known bios for this version with clean me or without its ok i can clean it,
[B]Apple MacBook Air 7.2 A1466 13.3[/B]ok i was wrong that CPU is actually[B] Core i5-5250u [/B]according to linux, so it must have been examined otherwise by me, but now with macpro 12,1 bios the machine works, like most of the importantLeave a comment:
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Ok interestingly the mac goes into the linux grub, I remember the last time this disk had both linux and osx, now its strange that the bios tells grub that what used to be hd0 is now at hd7, seems to be related to the bios change, so it could be i just need to find the correct bios settings for this compo, maybe some stuff needs to be copied from the macbook air bios to this one, have little experience man...Leave a comment:
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NO WAAAY MAAAN
I have a screen now, i can see the flashing disk icon without SSD. no chime still but USB stays active, no keyboard light.
Once we put SSD the screen changes to no ENTRY without grey background then shuts down after few seconds
Another disk is being in trial, the screen remains black longer now...Leave a comment:
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same thing, do you know if there is any available bios for 7,2 the ones I found here are for 7,1
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One more thing, do you know if any macbook air early 2015 (known by serial number, I have no body) that comes with I-[B]5257U [/B]processor, apparently this CPU is coming out from...Leave a comment:
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Both reads similar 450k to 480k ohm...Leave a comment:
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I guessed its not important but i put it back on so it looks better. The voltage to ground for SMC_LID is 3.41v with LIO and without is 3.38v
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I just found that C1845 is missing, how critical is this 0.1uf badcap ? I will measure that after I get that cap inplaceLeave a comment:
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I'm testing with 2 different LIO boards and cables, same exact results. SMBUS lines seems to be fine according to what happens to battery reads. I did not find a flow chart for the EDP_PANEL_PWR signal and other important signals like EDP_BKLT_EN or the chime sound signal for example.
anyway this is my second bios trial, both have been cleaned. But maybe I will try an already cleaned image and update the serial number.
i hope i dont need to redo the SMC chip again anyway...Leave a comment:
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Ok I think I miscommunicated something that made you think there is a power cycle of any kind, power cycle is a process where you shutdown and restart the machine which i do manually.
The light starts green 2 seconds later it goes to orange, all rails are fine and coming up, we dont have edp_panel_pwr if we connect LIO cable though it comes only without connecting the LIO cable.
So even Lid SMBUS work fine without the LIO cable.
I went through all the chart a year ago and validated all voltages are present...Leave a comment:
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Does that mean, it needs to stay green before moving forward?
here it shows green then 2 seconds orange in that flow chart....Leave a comment:
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With LIO cable connected it starts green after 2 seconds it goes to orange (battery disconnected)
SMC_RESET_L at 3.34v
EDP_PANEL_PWR is 0volt (this scenario EDP_PANEL_PWR stays low) only when LIO cable disconnects it goes high after few power cycles...Leave a comment:
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I dont like this tone my friend, I have no nails. Also I'm not very gentle, I like to break stuff.
Also the flat/flex cable is needed for that green light to comes up, so I'm not sure if I follow any of your suggestions now.....Leave a comment:
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