hgoncalves
Active member
Does anyone has an A1370 820-2855-A CLEAN ME?
Tks.
Tks.
-
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A1370 820-2855-A CLEAN ME
- Thread starter hgoncalves
- Start date
Don't you have Medusa programmer?
If not, upload original BIOS somewhere.
If not, upload original BIOS somewhere.
hgoncalves
Active member
Hi, Tks.
I don't have medusa (if you can recomnend an UE shop to buy, and witch model and acessories to buy, i'll appreciate it).
I'm not sure if this original BIOS is OK, because it gave two reading errors, and not sure if the bios saved is the original one (it came from other shop)
drive.google.com
I don't have medusa (if you can recomnend an UE shop to buy, and witch model and acessories to buy, i'll appreciate it).
I'm not sure if this original BIOS is OK, because it gave two reading errors, and not sure if the bios saved is the original one (it came from other shop)
macbook A1370.zip
drive.google.com
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Tools for Macintosh repairs
www.cmizapper.com
Talk with Harald and he will tell what you need.
Give me time to find a good BIOS file.
hgoncalves
Active member
TKS!
I'll be waiting for the BIOS if you manage to find it, because I couldn't.
Tks.
I'll be waiting for the BIOS if you manage to find it, because I couldn't.
Tks.
Board Number by A Number - LogiWiki
We have Apple MacBook and iPhone Diode readings and general fault finding information compiled by the leaders in this area
hgoncalves
Active member
Hi,
I've tried to figure out the exact model of the board, but I can't find it engraved on the board anywhere.
The only number that I saw was this one on the img, glued on that component, and because i found a boardview with that exact number, I assumed that it was the board number. Isen't it?
I've tried to figure out the exact model of the board, but I can't find it engraved on the board anywhere.
The only number that I saw was this one on the img, glued on that component, and because i found a boardview with that exact number, I assumed that it was the board number. Isen't it?
Attachments
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hgoncalves
Active member
Hi,
I can't figure out what is the board number. I can't see it anywhere.
However, I'm not sure that the problem is the BIOS.
This mac has green light, fan spin, all the voltages are present, but i get no image (internal nor external), and i don't have USB activity.
The CPU gets hot, and i get all voltages, besides:
PPVCORE_S0_AXG_REG = 0V
Can you help?
I can't figure out what is the board number. I can't see it anywhere.
However, I'm not sure that the problem is the BIOS.
This mac has green light, fan spin, all the voltages are present, but i get no image (internal nor external), and i don't have USB activity.
The CPU gets hot, and i get all voltages, besides:
PPVCORE_S0_AXG_REG = 0V
Can you help?
Last edited:
Board Number by A Number - LogiWiki
We have Apple MacBook and iPhone Diode readings and general fault finding information compiled by the leaders in this area
hgoncalves
Active member
Do you get voltage at L7510?
Check CPUIMVP_PGOOD too.
ALL_SYS_PWRGD, PM_PCH_PWROK, PM_PCH_SYS_PWROK, PLT_RESET_L, all present?
Check CPUIMVP_PGOOD too.
ALL_SYS_PWRGD, PM_PCH_PWROK, PM_PCH_SYS_PWROK, PLT_RESET_L, all present?
hgoncalves
Active member
Hi,
Yes, i have voltages on L7510:
1=1V
2= 1.1V
CPUIMVP_PGOOD = 3.3V
ALL_SYS_PWRGD =3.3V
PM_PCH_PWROK =3.4V
PM_PCH_SYS_PWROK =3.3V
PLT_RESET_L =3.3V
Yes, i have voltages on L7510:
1=1V
2= 1.1V
CPUIMVP_PGOOD = 3.3V
ALL_SYS_PWRGD =3.3V
PM_PCH_PWROK =3.4V
PM_PCH_SYS_PWROK =3.3V
PLT_RESET_L =3.3V
Try this; just for test, not sure if good.
drive.google.com
3023 BIOS should work also.
drive.google.com
820-3024-B - K78 no test.bin
drive.google.com
820-3023 clean fix APFS.bin
drive.google.com
hgoncalves
Active member
I've tried the K78 no test.bin, but the result is the same.
With the other one (820-3023), the behavier change. It seams that it tries to boot, the fan spin for 1-2 seconds, and then stops, and keeps like that forever (looping spin and stop), and goes from 200 mA to 30 mA on bench PSU.
With the other one (820-3023), the behavier change. It seams that it tries to boot, the fan spin for 1-2 seconds, and then stops, and keeps like that forever (looping spin and stop), and goes from 200 mA to 30 mA on bench PSU.
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Try starting in SMC bypass mode.
hgoncalves
Active member
SMC bypass doesn't work. Still in reboot
Try this one too.
drive.google.com
820-3024-B macbook air.BIN
drive.google.com
hgoncalves
Active member
Hi,
This BIOS seams to be the correct one (the mac powered on, and rebooted after a while, and stayed powered on normaly after that reboot).
However, i still don't have any image, internal or external, and no aparent USB activity.
On bench PSU it reaches around 700mA, and stays on (fan spin).
This BIOS seams to be the correct one (the mac powered on, and rebooted after a while, and stayed powered on normaly after that reboot).
However, i still don't have any image, internal or external, and no aparent USB activity.
On bench PSU it reaches around 700mA, and stays on (fan spin).
Do you get voltage on both L7510/50?