Recent content by pauly341

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    imac 21.5" 2013 - similar boards

    Would totally agree - told the customer the same but hoping to spend a couple of hours on it and maybe pull a rabbit out of the hat ;>
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    imac 21.5" 2013 - similar boards

    120V was run through one of the USB ports - less damage then I thought I would see (someone stuck the end of a USB cord into an outlet). I removed some of the blown USB port chips but didn't want to go any further until I could check for STG/etc. No boot but I see a green light on the MB.
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    imac 21.5" 2013 - similar boards

    I'm working on an 820-3482 board but can't find the schematic anywhere. Does anyone know if any of the older iMac 21.5 boards are close enough? I mainly work on macbook pros and it seems the schematics don't change too much from year to year (just the board views). thanks, Paul
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    820-3115 : 1 sec fan spin loop with corrosion on LVDS side of mb in multiple places

    820-3115 stuck in 1 second fan spin loop. Multiple places with corrosion, cleaned well with ultrasonic. Replaced u5400 and ran wires reconnecting it to R5400. Another bad trace between Q5490 and r5494 fixed pm_slp_s3_l is toggling on and off and I traced it to multiple places on the board...
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    [SOLVED] 820-2936 : No keyboard, no trackpad, won't recognize drive

    EFI lock was it! Thx for saving me a lot of time!
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    [SOLVED] 820-2936 : No keyboard, no trackpad, won't recognize drive

    Greetings, I have an 820-2936 with no signs of water damage on either side of board. Boots fine with good video but will not recognize keyboard, trackpad, or drive. All voltages good on KB connector SMC_ONOFF__L signal is High (not sure if that is good or bad) power to USB ports, makes a...
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    [SOLVED] 820-3115 full boot on ac, charges and recognizes battery but will not run on battery

    Looked a bit closer at U5010 and found a bad trace between pins 1 and 3. Problem fixed!!!!!
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    [SOLVED] 820-3115 full boot on ac, charges and recognizes battery but will not run on battery

    PPBUS on batt is 12.34. There was liquid damage around U5010 - earlier I replaced R5014 because it was corroded and loose. After running ASD, I get the following; 4sns/1/40000000:idor-8.247 Best I can find in my research is this is a power issue but can't find the exact code. thanks, Paul
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    [SOLVED] 820-3115 full boot on ac, charges and recognizes battery but will not run on battery

    [SOLVED] 820-3115 full boot on ac, charges and recognizes battery but will not run on battery Greetings. I have an 820-3115 board works fully on adapter, sees and charges battery. With battery plugged in and fully charged, disconnecting AC kills machine. When starting only on battery, get a...
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    820-2879: AHT error 4sns/1/40000001:tn1d--1.000 : CPU heat sensor issue?

    Greetings - working on an 820-2879. Boots fine but locks up after running for 5 or 10 minutes. Getting AHT error macbook 4sns/1/40000001:tn1d--1.000. My best research shows is it's a cpu heat sensor. I checked around U5515 and also Q5501 but no damage anywhere. I was going to change these...
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    820-2879: No fan spin, all S5 rails present.

    Realized I should use my brain - checked for shorts on S3. Found one on PP5V_S3.. Stay tuned.
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    820-2879: No fan spin, all S5 rails present.

    820-2879 with no fan spin. All S5 rails present and charges battery. When attempt to turn on by shorting pins, light turns from amber to green and then back to amber. Something tells me there's a short but not sure how to proceed.
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    820-2879: PPBUS_G3H drops slowly from 12.4 volts

    I replaced all three, issue remains. A bit of clarification, The voltage starts at 12.44v and slowly decreases to 5V (it takes 45 seconds) and then immediately jumps back to 12.44 volts. The cycle then restarts. Also, SMC_BC_ACOK flips between 3.3v and 3v constantly. I checked SMC pullup...
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    820-2879: PPBUS_G3H drops slowly from 12.4 volts

    It doesnt. Light stays green when batt is connected
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    820-2879: PPBUS_G3H drops slowly from 12.4 volts

    17/18 = 2.9 ohms 27/28 = 20.2 ohms It does power on from a charged battery discharged for about 4 hours
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