820-00165

Mac Tech

Member
Hello everyone.

I have this motherboard that takes time to turn on. I suspect it may be bios.

U6100 voltages

1: 3.3v
2: 3.2v
3: 3.3v
4:GND
5: 0.56mv
6: 000.1mv
7: 3.3V
8: 3.3V

My question is, are these values ok?

I haven't tried another bios yet.
 

2informaticos

Administrator
Staff member
You didn't explain too much about the problem.
Machine turns on, but stays long time in progress bar, or what exactly happens?

If you have any other MacBook working board, do you get different voltages on the BIOS chip?
I assure you no.
 

Mac Tech

Member
exactly. the machine turns on but stays in the progress bar.

To my bad luck I don't have another board to test, but I'm pretty sure those voltages are missing. At least one.
 

Ares332

Member
Hello friend, I already loaded bios, with the programmer I have, lower the circuit and mount it on the table.
The problem remains the same, without image, Sinn Backlight and without sound, may the U6100 be damaged?
The U6100 of this MacBook is a 25q64FV Windobond I have another Mac with the same IC, but it is a MacBook Pro, A1502, I suppose the IC can serve me only by programing it true?
 

Ares332

Member
I already changed the bios ic, reprogrammed the bios, and it keeps doing the same error, without image, backlight and sound
 

2informaticos

Administrator
Staff member
"The problem remains the same, without image, Sinn Backlight and without sound"
???
You've said the machine stuck in progress bar before...
 
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