My problem is when the power cable on,the led 1,2 is on,hit the power button,the sound DON can hear,but led 3,4 is off,the fans is normal,but after half past minute,the fans begin loud noise, screen still black,is the problem is logic board or the LCD display?if the LCD display is ok,I want to change it just like a display
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My problem is when the power cable on, the LED’s #1 & 2 are on, hit the power button, I get the Bong sound, but LED #3 &4 are off, the fans is normal, but after half past minute, the fans begin ramping up with a loud noise, screen still black.
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Is the problem is logic board or the LCD display? If the LCD display is ok, I want to change it just like a display
=== Update (03/30/2020) ===
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I removed the HDD, so I don't know how to run diagnostic services, can you tell me? I will be very appreciative.
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I removed the HDD, so i don't know how to run diagnostic services,can u tell me,very appreciate,and here is what i do,i connect the keyboard and try to hit the cmd+alt+r+p,and open the imac and hit the button under the CD player on the logic board,even change the battery on the logic board,and it didn't work,i desperate now, maybe the logic board's problem,and the price is high now in EBUY,so if i can know the LCD display is good,my i can transfer it to a screen to let my mac mini use,and the price is ok,so,here is my problem and question if someone can give me some help, appreciate
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Here is what I did, I connect the keyboard and try to hit the cmd+alt+r+p, buttons and power up the system. I also tried hitting the button under the CD player, even changed the battery on the logic board, nothing worked.
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I’m desperate now, maybe the logic board has a problem, the price is high now in eBay for a replacement, so if I can know the LCD display is good, can I transfer it to a screen to let my Mac Mini use it?
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So,here is my problem and questions if someone can give me some help I would appreciate it.
My problem is when the power cable on,the led 1,2 is on,hit the power button,the sound DON can hear,but led 3,4 is off,the fans is normal,but after half past minute,the fans begin loud noise, screen still black,is the problem is logic board or the LCD display?if the LCD display is ok,I want to change it just like a display
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=== Update (03/30/2020) ===
+
+
I removed the HDD, so i don't know how to run diagnostic services,can u tell me,very appreciate,and here is what i do,i connect the keyboard and try to hit the cmd+alt+r+p,and open the imac and hit the button under the CD player on the logic board,even change the battery on the logic board,and it didn't work,i desperate now, maybe the logic board's problem,and the price is high now in EBUY,so if i can know the LCD display is good,my i can transfer it to a screen to let my mac mini use,and the price is ok,so,here is my problem and question if someone can give me some help, appreciate
My problem is when the power cable on,the led 1,2 is on,hit the power button,the sound DON can hear,but led 3,4 is off,the fans is normal,but after half past minute,the fans begin loud noise, screen still black,is the problem is logic board or the LCD display?if the LCD display is ok,I want to change it just like a display