Macbook pro a1502 emc 2835 bios error

[Miiuser]

Hello when trying to flash bios to the motherboard I get Verification error on address: 0x00000010, Device: 0xFF, Buffer: 0x5A.
Is there any way to fix this error?
Also the computer will no longer boot.

[Miiuser]

Re: Macbook pro a1502 emc 2835 bios error

Any suggestions on how to fix?

[lilnhan]

Re: Macbook pro a1502 emc 2835 bios error

I also have the same problem with this winbond chip. The error indicated the programmer didnt write the chip probably. Hence, your bios chip was corrupted. Therefore your computer won't able to turn it on. To fix it, you've to reflash the chip without any verification error. I'm also looking for a solution to reflash the chip without verification error. Did you flash via sam connector?

[Miiuser]

Re: Macbook pro a1502 emc 2835 bios error

Hello yes i flashed via the sam connector. I was able to flash the bios with no errors and the computer will not boot.

[lilnhan]

Re: Macbook pro a1502 emc 2835 bios error

which programmer did you use?

[Miiuser]

Re: Macbook pro a1502 emc 2835 bios error

i used ch341a.
Any solutions for this or should i just use the laptop for parts?

[peste]

Re: Macbook pro a1502 emc 2835 bios error

i used ch341a.
Any solutions for this or should i just use the laptop for parts?

don't use the clip...it gives errors...remove the bios chip from the board before writing or reading...use these programs..
https://www.badcaps.net/forum/showpo...6&postcount=10
https://www.badcaps.net/forum/showpo...04&postcount=7
just for example..
https://www.youtube.com/watch?v=DWWigscuQDY
try this... if it doesn't work post the full name and model, EMC, serial number S/N, etc...

[lilnhan]

Re: Macbook pro a1502 emc 2835 bios error

don't use the clip...it gives errors...remove the bios chip from the board before writing or reading...use these programs..
https://www.badcaps.net/forum/showpo...6&postcount=10
https://www.badcaps.net/forum/showpo...04&postcount=7
just for example..
https://www.youtube.com/watch?v=DWWigscuQDY
try this... if it doesn't work post the full name and model, EMC, serial number S/N, etc...

I've been using clip on macbook 2011 and 2012. it never give me problem. It's not possible to use clip on macbook 2013-2017. I highly recommend neogrammer over asprogrammer

[Miiuser]

Re: Macbook pro a1502 emc 2835 bios error

don't use the clip...it gives errors...remove the bios chip from the board before writing or reading...use these programs..
https://www.badcaps.net/forum/showpo...6&postcount=10
https://www.badcaps.net/forum/showpo...04&postcount=7
just for example..
https://www.youtube.com/watch?v=DWWigscuQDY
try this... if it doesn't work post the full name and model, EMC, serial number S/N, etc...

I use the socket on the motherboard to program the bios chip. I removed the bios from 9 macbook only this one gave me an error.