I have the same problem , so I will repair it.
I bought LED light checker , test result is each stripe 54V shown.
I found one of boost schottky diode ( STR0+ ) exploded. also mosfet has burned.
according to A1267's service manual I can find 24.5v and 15V from PSU into MLB.
I need to clarify "Power Source voltage firstly". please tell me some data if you have a exprience.
Question:
# PSU Connector's Pin voltages: Can you tell me correct voltage each connect pin on MLB ?
** now I measured pin#1 : 24.5 V , pin#2 : 24.5 v ( tied up pin#1 ) , pin#3: GND , pint#4 : GND ( tied up pin#3 ) , pin#5 : ? , pint#6 : ? , pint#7 : ?
# Back Light LED test result
** I can read about 54v each stripe by Back light Test. I guess back light well.
**
I am going to exchange 540N Boost MOSFET and B2100 schottky diode and HV9982 controller.
firstly I have to check power source of back light , locally I guess PSU provide 24.5V.
order to check TP11 --> TP12 --> TP81 and STR0+
anyone who know proper parts?
# Mosfet part : Rds value ?
# Schottky Diode part : Vd value ?