Hi guys, please help me fix my BIOS dump (clean ME as well if possible), it's slow on loading bar and stuck on apple logo when loading bar 25-50% 
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Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo
Serial Number:
C02LW5T1FD59Last edited by guzq; 01-19-2021, 07:32 AM.Comment
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Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo
Try original dump, without battery!Comment
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Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo
I did, when loading bar almost finish, it stuck...Attached Filesif you find these attachements useful please consider making a small donation to the site
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Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo
Sorry for late post...
Amazing...this one working
Thanks Ghamidi like always
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Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo
Happy for u
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Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo
Model: MacBook Pro Retina 15,4 A1398 EMC2881
Year: Mid-2014
Logic Board Number: 820-3787-A
The serial was replaced, look for 123456789012 and replace it to your serialComment
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Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo
Im about to try this one now because mine gives AHT Error 5101D, and no friggin info on the net about this code. Its NOT related to Firewall because it isn't connected to LAN/WIFI.
I've reballed the SMC, but same issue. So the only thing to try is BIOS/EFI reflash with another one. Already put my original SSN in to it.Comment
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Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo
Although that got rid of AHT Error 5101D, its in a different keyboard language and wont accept my WiFi password.
Also wont detect SSD. Pretty bad BIOS you put up there.Last edited by gurj1979; 05-21-2022, 03:34 PM.Comment
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Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo
Try the one at post #8 ,copy in your serial and modify the fsys checksum
https://www.badcaps.net/forum/showpo...43&postcount=5
4.3. AppleComment
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Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo
Thanks dude.
Post #8 gave no display. I even tried to copy the Hex Range for KRID (17D000) and paste to my original one, but same deal - no display.
I'll try the FSYS Method you suggested with the the BIOS which didn't detect SSD.Comment
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Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo
HI i have macbook pro 820-3787-a stuck with apple logo
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Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo
try..Originally posted by kimsanDue to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:
>>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<
Every donation made will go towards server fees and maintenance costs.Comment
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Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo
same issue stuck with apple logo until turn off machine automatic , fan spinAttached Filesif you find these attachements useful please consider making a small donation to the site
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Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo
Please can someone clear the ME region on this bios dump for me.Comment
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Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:
>>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<
Every donation made will go towards server fees and maintenance costs.Comment
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I have a 15 - inch Retina MacBook Pro from the mid - 2014 model. Here is the link: https://www.badcaps.net/forum/showth...light=820-3662 . The battery broke some time ago. After I removed the battery and plugged in the original power adapter, the MBP could boot up normally. However, when I checked with IntelPowerGadget, I found that the CPU speed was limited to 0.8 GHz, and it ran very slowly. Later, I found a solution on GitHub. There is an open - source project called cputune that can set the CPU running speed. So I can now run the MBP at full speed. But another problem... -
Hello All,
tl;dr: minimal electronics experience and my first repair, lifted 8 pads off the laptop display LED controller board when attempting a connector replacement, options are attempting pad repair or jump wiring.
Laptop Model: MacBook Pro 15 Mid-2014 Retina, A1398 MGXA2LL/A
eDP Display: Samsung LSN154YL01-A02, assembly sold as Apple part 661-8310
Soldering Equipment: Hakko FX-888D w/ T-18 tips (Chisel, Conical, Bevel types)
I needed to replace the 30-pin I-PEX Cabline connector (labeled J8300 in the Apple 820-3662 mainboard schematics),... -
Hi Guys,
I've got 2.2GHz i7 Logic board for MBP 15" A1398 Mid-2014 MacBook Pro. Received it with no past history. Did some microsurgery to move iSight adapter to it as it came to me with ripped pads for it and no connector. Have been waiting for a heatsink to arrive to start fully testing when assembled..
Everything seems working: booting / charging, however FANS run on full blast (MAX FAN RPMS)
Thought to check what ASD can point out and it gives no specific clue. It goes to certain point and then machine goes to sleep and does not come back on. Adding... -
Hi Everyone!
Will be forever grateful if someone can give insight/direction.
Got machine with liquid damage - Apple MacBook Pro 15-Inch "Core i7" 2.5 Mid-2014 (DG). Wasn't powering on completely. After inspection got the idea that charging IC is blows and couple more places of corrosion (swapped few more components form doner board).
I have a spare working logic board with irrelevant physical damage (just a donor board to me now) Apple MacBook Pro 15-Inch Mid-2014 (IG).
Replaced U7100 (ISL 6259) from it - powers on OK now, though battery... -
Hi all,
I’m trying to recover a Samsung UE55HU8500L (curved UHD, 4K model from 2014) after replacing the panel. The new panel is a 55A1UU8EH, which produces excellent image quality — very close to the original.
However, since the swap, the TV enters a boot loop (Samsung logo → restart) unless I enter the service menu and perform a reset.
The service mode had been previously modified — possibly by a technician or during the panel swap — and I suspect some key settings are mismatched for the European (Greece) market.
Additional issues:...
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