Hi all, you have a solution, information on jumpers to disable the discrete on A1398 820-00426-a.
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A1398 emc2673 820-00426-a disable the discrete
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Re: A1398 emc2673 820-00426-a disable the discrete
Should work the same as 820-3332.
https://www.badcaps.net/forum/showpo...47&postcount=3OpenBoardView — https://github.com/OpenBoardView/OpenBoardView
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Re: A1398 emc2673 820-00426-a disable the discrete
Hello everyone. Initially it turned on, there was a gong, there was no image. I found two solutions to disable the discrete card and transfer to UMA, tried both, now: there is a gong, there is a backlight, there is no image. Was guided by the solution and the diagram from A1398 820-3332 in brackets,
signals LCD_MUX_SEL LCD_MUX_EN put on GND, L9330 L9410 (L8960 L8930) turned off, and applied 3.3v to LCD_BKLT_EN and LCD_PWR_EN.
One of the similar topics http://********/viewtopic.php?f=51&t=106005
Disconnected discrete on these devices. There GMUX is not alone, there is one mikruha that controls everything and the other is just an analog switch! What did you change? I would remove the U9600 microcircuit, then I would turn on the matrix power, the backlight resolution, and so on with five wires. Namely, LCD_MUX_EN -3.3v, LCD_PWR - selection from the built-in, LCD_BKL_EN-selection from the built-in, LCD_MUX_SEL- GND, well, supply 3.3 volts to the PWM backlight, and you turn off the discrete, even the power will not go to it. If the working processor and analog commutator, then you will immediately receive an image on the built-in Intel, if there is no image, check the analog commutator. Sometimes there is an apple and after loading it hangs. In general, I have often come across dependencies on these platforms immediately after loading. The described method immediately cuts off everything except the processor, if problems remain, then we look at the power supply of the processor, and then the percent itself.
Can you tell me what I'm doing wrong or it doesn't make sense Thank youLast edited by skynet85; 07-01-2021, 01:58 AM.
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Re: A1398 emc2673 820-00426-a disable the discrete
Originally posted by mon2 View PostThere are many that enter the witness protection program after they get the help they need from this forum.
I completely agree with you Mon, well said.
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