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  1. P

    820-3115 two keys not working on keyboard

    I have a 820-3115 with the "7" and "U" key not working. Already replaced the keyboard and still same result. Any ideas??
  2. P

    [solved] 820-3437 STILL with no backlight 8.5v on output after replacing LED driver

    YES!!! Ran a trace from D7701 to pin 5 of 8550 and I HAVE A BACKLIGHT!!!! Thanks for all the help.
  3. P

    [solved] 820-3437 STILL with no backlight 8.5v on output after replacing LED driver

    I emailed you some larger photos too
  4. P

    [solved] 820-3437 STILL with no backlight 8.5v on output after replacing LED driver

    The only corrosion I saw was on C7796 which I replaced
  5. P

    [solved] 820-3437 STILL with no backlight 8.5v on output after replacing LED driver

    No Title
  6. P

    [solved] 820-3437 STILL with no backlight 8.5v on output after replacing LED driver

    BKL_PWM is present at .666V
  7. P

    [solved] 820-3437 STILL with no backlight 8.5v on output after replacing LED driver

    Can I run a trace from pin 1 of C7796 to ball A5???
  8. P

    [solved] 820-3437 STILL with no backlight 8.5v on output after replacing LED driver

    Water damage
  9. P

    [solved] 820-3437 STILL with no backlight 8.5v on output after replacing LED driver

    Can I run a trace from pin 1 of C7796 to ball A5???
  10. P

    [solved] 820-3437 STILL with no backlight 8.5v on output after replacing LED driver

    Thank you Louis, I have 8.5V on circuit (measured at bklt fuse). I have replaced the 8550 twice now with new ones, and still no luck, I have measured bkl_en signal at 7715 and recieve 2.8v. Also I do see flashing folder with flashlight on screen.
  11. P

    [solved] 820-3437 STILL with no backlight 8.5v on output after replacing LED driver

    I have a 820-3437 I replaced 8550 with new one and still no backlight.
  12. P

    820-3437 with no backlight

    I have replaced lp8550 with new one and still no back light
  13. P

    820-3437 with no backlight

    I just ordered new ones, I also measured before and after D7701 with 8550 off, I receive 8.54V on both sides
  14. P

    820-3437 with no backlight

    no i do not have any new ones i pulled 8550 from another board
  15. P

    820-3437 with no backlight

    i replaced 8550 and still no backlight?
  16. P

    820-3437 with no backlight

    can i source any u7701/u9701 from any board??
  17. P

    820-3437 with no backlight

    thank you!
  18. P

    820-3437 with no backlight

    I just want to verify LP8550 is bad before replacing it
  19. P

    820-3437 with no backlight

    I am using boardview, and schematic I do not know how to verify that line is good, when i said the line looks good, I was speaking of the components look ok
  20. P

    820-3437 with no backlight

    Can you help me with verification of feedback line is good please?
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