Hi guys after few weeks I am again back to work. I have got Dell Inspiron 3521 With burnt KB9012QF EC and I have replaced it with brand new chip. After I connect the power adapter Maxim's 9012 Programmer indicates connection with Programmer (Flash unit) ok but "NO"communication with kb9120.
Keyboards pins are correctly connected and I double check the pins of the programmer all the things are ok.
I have programmed many KB9012QF chips with this programmer but all those are Acer v3-571. This is the first time I am flashing Dell 3521.
Please help me.

such chip with many pins , i cant think of any problem but there is one pin that isnt connected correctly , try cleaning pins , putting solder on them ,
in the end if this didnt do , if its not the case , then there might be some kind of flash protection