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  1. P

    820-3476A Short to ground on PPVCC_S0 HELP

    can J6100 be removed and still boot the device? I did not remove the chip. No visible corrosion around u1900
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    820-3476A Short to ground on PPVCC_S0 HELP

    OK, so I checked all the resistors around u6100, all good. I then reheated u6100 for good measure as I didnt have donor board for it. I got backlight and chime but no display. I did a NVRAM reset and now im back to no backlight, no chime. frustrated
  3. P

    820-3476A Short to ground on PPVCC_S0 HELP

    All other rails are present. This one is the only one I get tone to ground in continuity mode. This is a very different world from cell phones. Two rails is all I'm used to so please forgive my ignorance. I have good voltage on all the other rails when i plug it in to the charger. There was...
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    820-3476A Short to ground on PPVCC_S0 HELP

    i've tried the PRAM reset with no effect. I know not to put continuity with power to a board.. I checked with the device dissembled. No caps lock light. 36 mV on PPVCC_S0-CPU
  5. P

    820-3476A Short to ground on PPVCC_S0 HELP

    apologies, I normally work on phones. I get orange/green light on charger, and fan spins up. no chime, no image/backlight. when i put my multimeter in continuity, positive on PPVCC_S0_cpu, neg on ground, i get a beep.
  6. P

    820-3476A Short to ground on PPVCC_S0 HELP

    36 ohms is what i get measuring from c1011
  7. P

    820-3476A Short to ground on PPVCC_S0 HELP

    So I had a customer bring in his device with water damage. Very clean. NO chime, No backlight. Only real corrosion was on R3201 on the PP3V3RHV pad which was entirely gone. I ran a Jumper from the thunderbolt connector pad, to the replacement resistor and tied it all back in. But I can not for...
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