820-3437 no image on the LCD


New member
I have 820-3437 no image i have cpu vcore when i measure on pins 18 and 19 on J8300 i should have PP3V3_S0SW_LCD_R but i get 0 volts and that took me to U8300 so on pin 2 and 3 on U8300 i have PP3V3_S5 but on pin 1 i should have EDP_PANEL_PWR and that is missing and following that line takes me to the U0500. Any ideas ?


This thing is not even POSTing. No use to look for EDP signals. Need to know where damage was, this could be anything. Obvious is to check around ROM chip, clock chip, SMC first.