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Customer spilt pot noddle over keyboard. Mac would not power on. Cleaned out keyboard and removed logic board. Area around UT890, CT701 and LT700 corroded. The via under pin 1 of LT700 had completly gone so ran a wire from pin 2 PP5V_S2_DFR_FILT to CX401 Pin 1 ( I did not replace LT700)
Board very clean - no liquid damage.
Both USB-C Ports showed signs of damage. Cleaned up damage as best as I could.
On one port I get 5v 0.00a on the other port I get 5v 160mA but if I spin the charging cable around I will get nothing on this port (AMP meter does not light up)
I managed to get the board to work by heating the CPU. Booted up and I had display.
Shut it down to reassemble and tested again but would not come on.
Board now stuck at 20v
Draws 220mA for 5 seconds then drops to 160mA and stays at that.
Would an SMC reset fix this or am I looking at a problem...
Liquid damage on LCD connector but only where it connects to the screen not on the logic board. Tried a replacement screen and also replaced the cable as it was seriously burnt / corroded but no luck.
Only one of the USB C ports works at the moment the other one just keeps blinking the AMP/Volt...
Was power cycling but after reflowing CD32's power cycling has stopped
Amp meter shows 5.19v 0.02a
Has had liquid damage in the past as white markers are red.
No signs of corrosion
PPBUS_G3H = 0.09v
PPDCIN_G3H = 5.20v
PPBUS_G3H resistance to ground = 14.52MOhms
I'm thing to replace the...
Hi MacBook 15" 2008 board 820-2532-A
It would not power on but I repaired it so it now powers on but Beeps once every five secconds. This goes on forever.
According to Apple's support site this indicates a RAM issue or RAM not being detected by the Mac.
Have tried swapping out the RAM but no...
With battery connected the charger light will after 30 seconds or so turn off. MacBook will still stay on and run but battery no longer charging.
I then have to remove the charger from the mains and count to 20/30 seconds before the charger will work again.
If I plug the charger back in the same...
I have a MacBook Air 13" A1466 820-3209-A
There was corrossion under the backlight driver U9701 and no backlight. I changed the chip with a new one and now I get backlight but only if the battery is disconnected.
If I attached the battery I don't get backlight but I do get image.
I have the above board which had some water damage. I've managed to get the board working and Mac OS loads fine. A lot of the liquid spilt onto the touch bar connector area especially J5100.
I couldn't find a replacement touchbar in the UK for the a1989 but ordered one for the a1708 which I...
I'm getting display from an external monitor but not from the LCD.
Shining a light through the back of the screen does not show up any icons etc.
Without having a test screen to try what's the best way to determine if it's the logic board or the LCD? I've measured the voltage at pin 1 of...
I have an 820-01521-a board which had liquid damage. I was only getting 5v on my USB-C meter and 0v on ppbus_g3h. I went ahead and replaced isl9240 and now I get 20v on USB meter but ppbus_g3h only 12.58v for 30 seconds and then drops to 12.26v for 10 seconds. This process keeps repeating.