Blank screen, led 1 2 3 5 are on. Fan starts speeding up
Dropped the LCD, purchased new, and I get a blank screen. LED when boot LED 1, 2, 3, and 5 are on. LED 4 off.
Es esta una buena pregunta?
Puntuación
0
726880
1 Respuesta
Respuesta Más Útil
Rep: 479.9mil
35
329
971
Inspect the logic board connectors for damage. It doesn’t take much to mess you up if the screen pulled away.
Also did you transfer the thermal sensor to the new screen?
Fue útil esta respuesta?
Puntuación
1
Agree. If fans are revving, it's likely the machine isn't getting a check in from a specific sensor. I wasn't aware this model had 5 LEDS, but LED 4 on other iMacs is generally the indicator for video is being sent to the display/display is detected. I would be suspect of either the cables, if they were transferred from the old display) or the connections on the board, specifically the one with the locking lever since the other connector is for backlight/power.
