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  1. iClub

    Bios needed 820-2491-a

    I can't download this BIOS, I need it.
  2. iClub

    820-3478 No power

    U7400 13- 5,098V 14- 5,101V 3- 3,31V
  3. iClub

    820-3478 No power

    U6921 1 - 3,3v 2 - 3,3v 3 - 0v, no pulse. 5 - 16,82mV 6 - 8,64mV 7 - 3,31V 8 - 3,31 V L7410 3,47mV, no pulse. L7510 1,26mV, no pulse.
  4. iClub

    820-3478 No power

    UB510, UB530, UB550, UB650, and U9700 get warm by looking through the thermal camera. Could it be GPU?
  5. iClub

    820-3478 No power

    U7000 3 - 3,07V 6 - 0V, no pulse 8 - 0V, no pulse 11 - 0V, no pulse
  6. iClub

    820-3478 No power

    "PLT_RESET_L pulsing at the same time?" It doesn't pulse.
  7. iClub

    820-3478 No power

    Sorry, I entered the wrong schematic, 820-3299 is the correct schematic. PM_EN_REG_CPUCORE_S0 0V, pulses when the SMC_ONOFF is triggered
  8. iClub

    820-3478 No power

    L7610 3,31V L7650 5,098V L7310 1,5V L7800 12,2V L7720 1,063V L7910 0,901V L7930 0,904V L7950 0,904V L8050 0,904V L7100 12,1V L7710 1,5V L8220 12,07V L8260 12,07V L8240 12,07V PPCPUVCC_S0_CPU 0V, no pulse REG_PHASE_CPUVCC_3 0V, no pulse REG_PHASE_CPUVCC_2 0V, no pulse
  9. iClub

    820-3478 No power

    Lights up 1 led, client reports that it turned off unexpectedly. Voltage: PP12v_s0 12,12V 12_s5 12,11V PP3v3_s5 3.3V 5v_s5 5,098V PP5V_S4 5,1V pp3v42 3,4V PM_SLP_S5_L 3.3V pulses when triggering SMC_ONOFF_L.
  10. iClub

    820-00165 No power

    PM_SLP_S4_L 0v P3V3_S5_LL 0,543v PP5V S5 0,930v P5VS4RS3_EN 0v S5_PWRGD 0V PP3V3_SUS 0V
  11. iClub

    820-00165 No power

    Good morning, this mac has suffered oxidation in the region of C1212. It came from another service where they reflowed the SMC, replaced it, but it won't turn on. Voltage: PPbus; 8,59V PP3v42: 3,42V ALL_SYS 0,115V PP3V3_S0 0,056V PLT_RESET_L 0,032V SYS_PWROK_R 0V PM_S0_PGOOD 0v Does not...
  12. iClub

    820-2936 without audio drivers.

    Hello, I have already changed U6201, U6500, U6880 and U6630, but it didn't work. I removed the R6805 and it didn't work. I don't know what to do anymore, where to measure!!!
  13. iClub

    820-00840 Data does not work on USB-C

    Which lines are USB-C 3.0?
  14. iClub

    820-00840 Data does not work on USB-C

    I soldered a new chip, but usb-c 3.0 doesn't work. Is there another component that also does this management?
  15. iClub

    820-2936 no logical activity

    No history available. I don't own a RAM slots tester. Can you recommend a quality one to buy?
  16. iClub

    820-2936 no logical activity

    Good morning, I have a mac that came with fan spin, but it won't start. PPVCORE_S0_CPU : stucked on 1.1V I've tried another BIOS, but without success. I've tried other RAM memories too and found small oxidations on the contacts of the memory slots, I cleaned them but nothing changed. I noticed...
  17. iClub

    [SOLVED] 820-3115 No power on, no fan spin.

    "Try known good BIOS" I made it, and it worked. Thank you for the support!
  18. iClub

    [SOLVED] 820-3115 No power on, no fan spin.

    "CPU coils have 001-003 ohm as normal for i7-i5 Ivy Bridge CPU" Noted, thank you! Using the voltage injection method, I found C6213 shorted, replaced it and the short was resolved. 5V and 3V voltages are now stable. The board now rotates the fan, but has no logical activity. PPVCORE_S0_CPU...
  19. iClub

    [SOLVED] 820-3115 No power on, no fan spin.

    Inverse diode values on big coils: L7260: 0V (shorted to ground in continuity mode) L7220: 0,153V L7330: 0,153V L7550: 0V (shorted to ground in continuity mode) L7510: 0V (shorted to ground in continuity mode) L7520: 0V (shorted to ground in continuity mode) L7100: 0V (shorted to ground in...
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