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  1. bruce1129

    820-3435-B NO BACKLIGHT, ic is not sending boost signal.

    thank you for clarifying so quickly i appreciate it
  2. bruce1129

    820-3435-B NO BACKLIGHT, ic is not sending boost signal.

    820-3435-b. voltage is 8.6 on backlight line where the boost signal should be sent to. the ic is getting voltage in, the enable signal is present, the voltage divider resistors test as normal, the voltage on the dividers is also what it should be. the chip was burnt and there was dirt...
  3. bruce1129

    820-3435-b no backlight, fuse keeps blowing

    Its blowing randomly as far as i can tell. ive had to replace it 3-4x already just looked inside the connector with the microscope, its burnt out on the inside. around the backlight pins.
  4. bruce1129

    820-3435-b no backlight, fuse keeps blowing

    PPBUS G3H 8.6 VOLTAGE ON LCD BACKLIGHT BOOST 39V CHANGED BACKLIGHT IC, NO LUCK. NOT SURE WHAT I AM MISSING. any suggestions are welcomed. (did find a few resistors on PPVIN_S0SW_LCDBKLT that do not measure in ohms correctly, but i replaced them (and measured before i did) and its almost like...
  5. bruce1129

    820-2523-b no pm_slp_s4 present, all s5 power rails present

    its 3.3v (not sure if that is high or low)
  6. bruce1129

    820-2523-b no pm_slp_s4 present, all s5 power rails present

    using 85w doesnt make a difference, i just bought an original 85w and used it, measurements are the same, still no power
  7. bruce1129

    820-2523-b no pm_slp_s4 present, all s5 power rails present

    60w is the highest im finding in my store, ill buy an original 85w and see if that helps.
  8. bruce1129

    820-2523-b no pm_slp_s4 present, all s5 power rails present

    the charger is original, and i did inspect the board for missing components, everytime i saw a spot that looked like it might need something it was an omit or no stuff spot. ill check the smc and the area around it, and check slp s4 for a short, thanks
  9. bruce1129

    820-2523-b no pm_slp_s4 present, all s5 power rails present

    ok thank you
  10. bruce1129

    iphone 6s goes from approx 99% batttery to dead, then will turn on, then dead again

    i reflowed u4500 (tristar) a few times and its good now
  11. bruce1129

    820-2523-b no pm_slp_s4 present, all s5 power rails present

    im buying them from ebay so i have something to practice on before coming to your guys' training soon. resistance to ground on 3v42 is.....(measured on c5725, diode mode .636, 20.94 kohm measured as well)
  12. bruce1129

    820-2523-b no pm_slp_s4 present, all s5 power rails present

    d6905 (which is the component directly after r6905 that i had to replace) , pin #2 says "nc 2727" which i thought nc meant not controlled, yet its putting off 10v, does that mean anything?
  13. bruce1129

    820-2523-b no pm_slp_s4 present, all s5 power rails present

    both sides of l7771 were 1.05v
  14. bruce1129

    820-2523-b no pm_slp_s4 present, all s5 power rails present

    nothing happens. so i can short smc_onoff_l on any board and its the same as pressing the power button.
  15. bruce1129

    820-2523-b no pm_slp_s4 present, all s5 power rails present

    ok thank you
  16. bruce1129

    820-2523-b no pm_slp_s4 present, all s5 power rails present

    power pads? sorry im fairly new to this, what do you mean by that please
  17. bruce1129

    820-2523-b no pm_slp_s4 present, all s5 power rails present

    820-2523-B NO PM_SLP_S4 PRESENT, ALL S5 POWER RAILS PRESENT IDK WHAT TO DO FROM HERE, green light (yes) charges battery idk i also believe that vr pwrgd delay was 0v as well idk what im missing/where to go from here. i tried finding a short but no luck *bought from ebay to practice on, previous...
  18. bruce1129

    820-3209-A liq. dmgd, powers on, chimes, turns off after 3-5 sec only with ssd or..

    ended up being the damn keyboard. (which is connected thru the trackpad connector obviously)
  19. bruce1129

    820-3209-A liq. dmgd, powers on, chimes, turns off after 3-5 sec only with ssd or..

    ok so if i unplug the track pad, the unit will stay on and give a green to amber light, so does this mean i have a short or just an issue on the trackpad circuit?
  20. bruce1129

    820-3209-A liq. dmgd, powers on, chimes, turns off after 3-5 sec only with ssd or..

    i reflowed the SMC first, but it still kept turning off, then i just removed it from the housing, now i get a green light that goes to an amber light on the charger (before i got no light, i assumed it was bc im using an aftermarket charger) fan still runs high, but not right off the bat...
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