Re: SOLVED! Need help with 820-00165, power button has to be held long to start!
Hi Guys! SOLVED!
U8020 has failed. I was measuring resistance around Q5510 and found that PM_SLP_SUS_L was at 1,5kohms. It should be around 80k to ground (value stolen from a known good 00165). Either q5510 or u8020. or pch...but I was lucky!
Thanks for the support!
Regards, Andras
colos85
Member
Last Activity: 02-11-2025, 01:21 AM
Joined: 09-20-2020
Location: Budapest
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Re: Need help with 820-00165, power button has to be held long to start!
Hi David,
I still have this board with the same problem. Unfortunately no solution yet. SMC replaced, as mentioned above, checked resistors around u7100, u5600/01... With the same values an other board is running fine.
Now I am trying to find if there is some power rail that remains on in a "lower" state. As I know If any usb/sd card is connected deep standby is forbidden. What I can imagine, if this happens BMON says too much current is taken in off/standby state, where that...Leave a comment:
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Re: Need A1708--820-00840-01 schematic with boardview
Thank you!Leave a comment:
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Re: Need help with 820-00165, power button has to be held long to start!
Hi MobileXT,
Apple diagnostics found nothing. I have replaced the SMC, known good one (year matches), same behavior. Why the issue comes on ONLY after booted at least to the login screen? What changes then?
As per Istat menus the current values are correct compared to any other logic board. Could this be a corrupt EFI? Because it had to be changed previously... (cleaning done).
Thank you!Leave a comment:
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Re: Need help with 820-00165, power button has to be held long to start!
Hi MobileXT,
Thank you so much. All of them are checked and having correct values.Leave a comment:
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Re: Need help with 820-00165, power button has to be held long to start!
Indicators are white. No corrosion found, never washed with US cleaner. Smc was reflown, so repair attempted before with no success. When i got the board it was not turning on due to a missing rail. When powered on apple logo came up after 20-30 secs, at appr. 40 sec the board turned off. Froze when nvram reset done, but sometimes it was able to boot. Known good bios file, ME cleaned, serial matched, burnt on a tested eeprom, voila running great. Except for the battery mistery.Leave a comment:
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Need help with 820-00165, power button has to be held long to start!
Hi Guys!
I have a 820-00165 that has some strange failure.
Runs with charger fine, charges battery.
The problem comes in without charger:
If battery is attached can be started with power button until it boots into OS.
After shutting down form os I have to press power button for 10secs to turn it on again. (Power pad does the same, so not a keyboard related problem!)
If battery is removed then reconnected the board can be turned on with a short press like it should. (Until it goes to OS)
If charger is connected the... -
Re: A1286 with 820-3330 sleep wake failure in efi, battery drains fast
Standby (deep sleep) was introduced in 2012 mid Retina MBP's, regarding Apple's description. However my one is a non retina 2012 mid 15" so I think this was the reason why I had problems with a 2,5" SSD. Earlyer MBP's wont have deep sleep problems, because they can not have. I am still using that EVO in my 2009 MBP.
I bought that 860 because it was in every top 5 suggestions for Macs all over the web. But the fun is 8XX series are trim blacklisted in the kernel. I would not be surprised...Leave a comment:
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A1286 with 820-3330 sleep wake failure in efi, battery drains fast
Hi,
Let me share you a story that could be useful - not just with this model mentioned.
Symptoms:
- Battery drains fast, 20-25% a day while sleeping.
- As soon as it runs flat Mac turns off, like normal.
- When hooked on charger starts twice (two chimes), then boots normally, but a message appears in the OS "Sleep wake failure in EFI..." The exact message already lost, but many things can cause this as I saw, so wont point out the source of the problem.
So I changed in pmset the standbydelays to 100, and hibernatemode... -
Re: New Members - please post your introductions here
Hi Everyone!
I'm from Hungary, working with electronics for 25 years, already mostly with notebooks - sorry Macs, thus I decided to join this forum. Mostly to learn hopefully to help as my experience allows! Cheers!Leave a comment:
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