Hey Guys.
I have this A1708 no backlight. On Q8400 pin i have 12.6v and pin 3 12.6 also. I checked C8400, R8401(80.6k) and R8402 all good so the voltage divider works good no issue there and when measured direct pin 3 to 4 on Q8400 it's 80k. I have input on U8400 on pin 5 and 18 i don't have output. All resistors around U8400 are good expect R8432 which should be 150k but it's 24.1. I removed it but then when measured directly it's 150k and i get diode value on LCDBKLT_FB. Also i noticed that R8440 which should be 1m it's 0.86 on 1m scale. Ideas?
I have this A1708 no backlight. On Q8400 pin i have 12.6v and pin 3 12.6 also. I checked C8400, R8401(80.6k) and R8402 all good so the voltage divider works good no issue there and when measured direct pin 3 to 4 on Q8400 it's 80k. I have input on U8400 on pin 5 and 18 i don't have output. All resistors around U8400 are good expect R8432 which should be 150k but it's 24.1. I removed it but then when measured directly it's 150k and i get diode value on LCDBKLT_FB. Also i noticed that R8440 which should be 1m it's 0.86 on 1m scale. Ideas?