MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo

[guzq]

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%

[SMDFlea]

Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo

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%

Post the serial number on the case .

[guzq]

Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo

Serial Number:
C02LW5T1FD59

[Ghamidi]

Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo

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%

try...

[guzq]

Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo

try...

chime on, blank image, nothing on screen...
try with another GOOD BIOS chip, same...blank display, nothing on screen.

try using old BIOS dump, image shown, apple logo (slow)...

[CraterM]

Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo

chime on, blank image, nothing on screen...
try with another GOOD BIOS chip, same...blank display, nothing on screen.

try using old BIOS dump, image shown, apple logo (slow)...

Try original dump, without battery!

[guzq]

Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo

Try original dump, without battery!

I did, when loading bar almost finish, it stuck...

[Ghamidi]

Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo

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%

try...

[guzq]

Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo

try...

Sorry for late post...
Amazing...this one working

Thanks Ghamidi like always

[Ghamidi]

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

Happy for u

[lg_cat]

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 serial

[gurj1979]

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 serial

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.

[gurj1979]

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.

[SMDFlea]

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.

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. Apple

[gurj1979]

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. Apple

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.

[kimsan]

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

[peste]

Re: MBP15 2013/2014 A1398 (820-3787-A) stuck on loading bar apple logo

try..

[kimsan]

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 spin

[BrandonJL]

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.

[peste]

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.

try..