Chosen Solution
So after trying many times to repair my 2011 iMac, I gave up and now I’m going to convert it to a monitor. I have that part solved — is there anyway to use the speakers? IF so, I can use this as a monitor for my mini.
Did you use this Driver Board? https://www.ebay.com/p/12015167280 I have an empty chassis of the iMAC EMC 2429 except for Left/right speakers. I installed the Driver Board kit and hooked everything up and it now works as a monitor via HDMI. I notice the Driver Board has Speaker Output and what looks like a 3.5mm connector for AUDIO. HOW DID YOU CONNECT THE INTERNAL IMAC SPEAKERS TO THIS DRIVER BOARD?? Update (06/21/2020) btw, How did you Power the Driver Board, I used a 12V/5A supply and notice this Power Supply gets pretty HOT. I also noticed the LCD display itself also gets WARM…I assume this is normal. Update (06/21/2020) I notice the Left Speaker has a 5 pin connector I notice the Right Speaker has a 4 pin connector Update (06/21/2020)
Speaker Connector PINOUTs for Logic Board 820-2828
Yes you can, and yes, it can be connected to a mac mini.
I notice the LCD brightness is low. Why does PWM signal go from 3V to 0V when you turn LCD on?? I checked the voltages on both the Original Apple Backlight Inverter board and the new Chinese Backlight Inverter board. Chinese INVERTER BOARD LCD on pin 1 11.45V pin 2 11.45V pin 3 4.53V (on/off) EN pin 4 0V (pwm) pin 5 GND pin 6 GND Chinese Inverter board LCD off pin 1 12.18V pin 2 12.18V pin 3 0V (on/off) EN pin 4 3.0V (pwm) pin 5 GND pin 6 GND
APPLE INVERTER BOARD LCD on pin 1 3.25V (on/off) EN pin 2 12V pin 3 2.88V pwm pin 4 GND pin 5 12V pin 6 GND
I found the attached “Current Adjustment Guide” on alibaba my Backlight Inverter Board has the following weld on RC3,RC4,RC5,RC6,RC7 NO weld on RC1,RC2 R10 has 1R00 resistor R11 has 2R00 resistor
