Search results

  1. isa1985

    820-01958 MBA 13" '20 A2179 The CPU becomes very hot

    I urgently need to read the serial number from this circuit board. I have an RT809F ISP Programmer and a 1.8V adapter, and I also have a CH341A. Could you help me read the SoCROM (U4770)? If I can read it, I will be able to see the serial number in a hex editor. Please don't ask why, it's...
  2. isa1985

    Microsoft Surface 1866 Bootloop

    Does anyone have a solution for a Microsoft Surface 1866 that turns off after displaying the Windows logo for 1-3 seconds when powered on? Pressing the power key again results in the same behavior. I've already removed the screen and updated the BIOS, but it hasn't resolved the issue.
  3. isa1985

    820-01958 MBA 13" '20 A2179 The CPU becomes very hot

    PPBUS_G3H: 12,6v PP3v3_G3H: 3,3v PP1V8_SLPS2R: 1,8v PP3V_G3H LDO_CORE LDO_RTC: 1,49v PMU_VPUMP: 4,98v PP1v1_SLPS2R: 1,1v PP3V3_G3H_RTC: 3,29v PMU_LDO3_OUT: 1,79v P1V8G3S_EN: 1,8v P1V8_G3S 1,8v P5VG3S_EN : 1,8v P5VG3S_PGOOD PMU_ACTIVE_READY: 1,79v P3V3G3S_EN PPBUS_G3H_SPKRL: 12,64v...
  4. isa1985

    820-01958 MBA 13" '20 A2179 The CPU becomes very hot

    The CPU becomes very hot immediately after connecting the power supply. Please take a look at the video. It initially had a broken display, which I replaced. However, I'm not sure if the device was functional when I received it, as I didn't test it. In any case, there are no signs of water...
  5. isa1985

    Macbook air 820-01521-02 No Backligth, No Image

    So, I can say now, I don't have any USB activity. I don't have external video. And Caps Lock LED showing nothing
  6. isa1985

    Macbook air 820-01521-02 No Backligth, No Image

    I think when I turn on this macbook, he come Automaticly to Internetconnection,and in this mode External Monitor (HDMI) not work, I checked it on working macbook. can you give me a tip, what else can i check more?
  7. isa1985

    Macbook air 820-01521-02 No Backligth, No Image

    I found little white prints, maybe I thought it was lying there
  8. isa1985

    Macbook air 820-01521-02 No Backligth, No Image

    oh sorry, no, I dont find any another shurt on board
  9. isa1985

    Macbook air 820-01521-02 No Backligth, No Image

    my be this macbook dont get some LCD enable signal? from LCD driver, or some anther Chip (IC)
  10. isa1985

    Macbook air 820-01521-02 No Backligth, No Image

    No, the pins 16,26,28 not shorted to ground
  11. isa1985

    Macbook air 820-01521-02 No Backligth, No Image

    So. Today I replace U8400, I was sure that this the Problem is, but this Macbook still with no image, no backlight. I put it again IN DFU mode, restore it again= nothing. But I am sure now, that is no Image signal on screen, before I was sure , I can't see nothing, cause no backlight, but when...
  12. isa1985

    Macbook air 820-01521-02 No Backligth, No Image

    Thank you. Please more details about USB activity , you mean that I have to connect USB Flash drive, or Mouse with LED? PRAM, done, no result. I have some video uploaded on Youtube
  13. isa1985

    Macbook air 820-01521-02 No Backligth, No Image

    This device come to me with not power on. After fisrt check, I find nothing, no liquid, No drop, USB Activity 5v after 3 seconds 20v. I was lucky, then I find samge device in my store. I connect the working board to this devices, and evrything work fine, so I was sure problem is on Board. Then I...
Top