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  1. quasimodo

    iMac 27" 2011 - no backlight - turns on for 1 second on boot

    dont know the 820 code.. 27" 2011 machine of a strong smoker... image is present - only backlight is missing. backlight turns on for 1 second on boot, then shuts off..
  2. quasimodo

    iMac 27" 2011 - no backlight - turns on for 1 second on boot

    Hey, any idea for this problem? iMac 27" 2011 Backlight not working. Graphics good, iMac boots, externally fully functional. The backlight turn on for 1 second when i press the power button - then shuts off. LED driver board is replaced. Same problem. Any ideas?
  3. quasimodo

    MacBook Pro 16" - 820-01700-A - 5V / 0.02A dead after connecting USB-C docking station

    Q3501 was causing short - crazy. this was a new chip. replaced with new one and its running.
  4. quasimodo

    iMac 21,5" 2017 A1418 820-00629-A - No video/image - all 4 diagnostic leds on

    chimes, after few seconds turns off, restarts again...
  5. quasimodo

    iMac 21,5" 2017 A1418 820-00629-A - No video/image - all 4 diagnostic leds on

    Hey guys, got a strange iMac here. From 2017. No image/video. When LCD is connected, all 4 LEDs are going on. LCD disconnected - 3 LEDs are on. iMac chimes, Backlight is turning on, fan is spinning. LCD fuse is ok. Heating up GPU? RAM? Whats going on with this machine?
  6. quasimodo

    820-00850-A - no video/image/no backlight - no liquid damage

    just changed internal LCD cable - everything is there. jesus with us.
  7. quasimodo

    820-00850-A - no video/image/no backlight - no liquid damage

    3v is there, 5v is there DP_INT_HPD is not there. 0V
  8. quasimodo

    820-00850-A - no video/image/no backlight - no liquid damage

    Hey guys, got a strange board here. MacBook dropped on floor / no liquid damage. Thought it was a bad lcd. chimes/boots/works externally. replaced LCD screen - no difference. pram reset/dfu - nothing. where to start?
  9. quasimodo

    MacBook Pro 16" - 820-01700-A - 5V / 0.02A dead after connecting USB-C docking station

    3 - 3.2 OHM on L7211/21/31 7 OHM on L7410/20 0.3 OHM at ppbus_g3h
  10. quasimodo

    MacBook Pro 16" - 820-01700-A - 5V / 0.02A dead after connecting USB-C docking station

    Hey! History for the board: water damaged / on top of the case replaced U3500 + Q3501 - board was working fine -> usb-c docking station connected on the side of the water damage -> dead -> 5V / 0.02A ppbus_g3h is 0V should i just replace the CD3217 or where to start to troubleshoot?
  11. quasimodo

    MacBook Air 13" - 820-00165-A - not turning on/orange light - u6100 corroded

    update: replaced u7090; jumper wire to r7080 PP3V42_G3H is 1.7V PPBUS_G3H is 0.5 something what´s going on with this machine?
  12. quasimodo

    MacBook Air 13" - 820-00165-A - not turning on/orange light - u6100 corroded

    Hi! Just gave some flux and hot air to the U6100 to see what happens: (had light before the whole time) no light at all - and i discovered that u7090 looks like shit hows that/is it possible?! replace u7090 and fix traces - should be a working machine?!
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