Hi everyone i need help on this MACBOOK PRO A1286 820-2915-B and it has AMD 1146 Graphics i need a working bios on this please.the problem is i cannot install mac os it's stuck on apple logo and then stays blank screen i have tested my flashdrive installer on other mac and it is working.please help on this
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Re: macbook pro A1286 bios needed
anyone please help -
Re: macbook pro A1286 bios needed
I need a working bios on this please helpComment
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Re: macbook pro A1286 bios needed
hereComment
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Re: macbook pro A1286 bios needed
thank you i will try this thanks againComment
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Re: macbook pro A1286 bios needed
i flashed with above bios still the same issue i cannot install mac os when i plugged in flashdrive and pres option button still no detection on the flash drive it shows on apple logo hangs up then blank screen. i have attached original dump can anyone fix this please thanks in advanceComment
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Re: macbook pro A1286 bios needed
anyone please help on this pleaseComment
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Re: macbook pro A1286 bios needed
ill tried external usb keyboard now option button show up then when i install the os apple logo comes up but it stuck at white screen steady cannot continue installation i also tried internet recovery once download finish the same issue not continuing installation it shows white screen steady. please anyone help me on this pleaseComment
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Re: macbook pro A1286 bios needed
its not bios problem
download known working dmg for that model
find and istall program called TransMAC and write .dmg to usb
plug usb and turn on mackine but hold button for boot menu (for some model it is C, sometimes its ALT or sometimes is OPTION key) and it must give options like boot from disk, boot recovery or boot from usb
that is what you needIm Back... sort of...
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Re: macbook pro A1286 bios needed
Thanks for the response ala borbe but i already dine that my two usb installer is working on the orher macbook if i install my installer is fine and also i done internet recovery i also done pram reset but still the same issue once i click install on flashdrive installer apple logo loading but not continuing it stuck at the end gives black screen then steady at white screenComment
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Re: macbook pro A1286 bios needed
ah, ok
if someone flashed bios from another machine may be ME region in bios is corrupted adn that may give similar symptoms
by googleing this board has problems with vga chip but usb communication is done trough pch... you may try to reflow to see what happensIm Back... sort of...Comment
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Re: macbook pro A1286 bios needed
Thanks ala borbe i think maybe gpu problem with this but if i press power button for 5secs and plugged in charger and release power button it starts the fan at full speed and i can continue install the os but there is problem it says charger not detected and there is blue lines attached is the image.and also battery not charging magsafe light green even battery is plugged in.any help pleaseAttached FilesComment
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Re: macbook pro A1286 bios needed
update:thanks for the help ala borbe I slight reflow the AMD gpu now macbook starts installing the mac os but i notice that is very slow. what could be the prob with this?Comment
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Re: macbook pro A1286 bios needed
update: after i reflowed amd gpu i successfully installed mac os and use fine for a day but this morning when i turn it again still came back the same issue apple logo loading then blinks the screen and white battery is dead i notice also when i plugged in the charger it automatically start the macbook and also if i pressed the power button for 10 secs and then plugged in the charger imediately it starts and fans spin a high speed but can log in to logon screen then restart. anyone can help me and advise what is the problem on this please I need help badly please anyoneComment
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Re: macbook pro A1286 bios needed
Anyone please help on this pleaseComment
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Re: macbook pro A1286 bios needed
Next step would be to replace that vga maybeIm Back... sort of...Comment
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Re: macbook pro A1286 bios needed
its is a very common problem with the amd gpu going bad on this model. the best solution is to replace the chip with a new one. i have reflowed a lot of them but they only work for some months before going bad again.
You need experience to remove the chip and install a new one . iF you are not sure if you can do it i am sure you can find someone in your area that replaces gpu ics.
Good luck!
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Re: macbook pro A1286 bios needed
Hi there! Just to let you know that I've tried to flash that dump, but programmer said "didn't match size" or something like that.
PS: I've made a ME Region cleaning to my original dump and worked like a charm. Let me know if you need me tu upload it.Comment
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Sublect line continuation: ... Jaguar IDS PC aka Panasonic
>Read BIOS guides, methods, resources and tools
>
Ack
>Try the method at BIOS guides, methods, resources and tools before requesting help
>
Ack
>Explain you were not able to succeed with the methods at BIOS guides, methods, resources and tools
>
python ./main.py "/mnt/c/temp/205605f9e1b60403a41787efeffe9cad-flas_maybe5.BIN" --output-dir "/mnt/c/temp/205605f9e1b60403a41787efeffe9cad-flas_maybe5.txt"
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Hi, I have an MSI PRO B660M-G DDR4 board with damaged BIOS and i need a bios dump from a real board, along with MAC, UUID and Serial Number info (eg. a BIOS screenshot and pictures from the board stickers).
I need to reconstruct the bios on my board, based on another bios image form a real board - meaning a bios image containing MAC address, UUID and Serial number. A stock BIOS is not suffiecient, as it is impossible to discover where the MAC, UUID and SerialNumber are stored. Tried with a similar board, but there are too much differences, and the stock BIOS is missing a lot of...11-17-2023, 10:56 AM -
First of all thanks to all of our members who have posted previously all methods posted here.
Please leave a comment if you find something new,or have anything else to add.
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Find by serial number,model number or series
If you know the laptop serial or model number go to HP support https://support.hp.com/us-en/drivers/laptops .
Enter the serial number or model number and click submit.On the next screen you will have to enter the OS
Operating system and OS version.If... -
Hi everyone,
I'm trying to recover a Fujitsu Lifebook E5513 (most likely 2023 model) that was bricked during a BIOS update. The update was interrupted (probably due to power loss), and now the laptop is stuck in a boot loop showing "PBB rollback" / "SBB rollback" messages.
BIOS access (F2) and Boot Menu (F12) are no longer possible – the system instantly reboots after the rollback messages.
I extracted the official BIOS update package from Fujitsu (contains FJNB2FD.CAP, ~18.7 MB) and tried tools like UEFIExtract, but it seems to only contain... -
Hi, my laptop wont boot at all
With original bios no POST, only LED lights
With alternative BIOS from model TP500LN (flashed via programmer) the notebook works again
Some issues
A- with bios from 500LN, it won't update from bios of model 500LA (from 500LN v203 to 500LA v300)
B- If updated from 500LN version 203 to 300, the battery stops being recognized
Things I tried
1- Update / clear ME: Took the non working bios, made a backup, and did this: https://www.badcaps.net/forum/troubl...theory/trouble...
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