A1706 TB 13 inch 2016 freeze

Yoel Ren

Member
Hi, i have my own (820-00239 i think?) i tried to test another lcd assembly, and when i try to reassemble everything, it doesnt boot at all, there’s apple logo but loading bar doesnt increase at all, i tried to boot to external, but it freeze at boot option with a bit of red tint at the lcd, caps lock doesnt work at boot option, so its not lcd problem( assuming caps lock light work at boot option ) does this have something to do with fmdf from mouser/digikey?
 

Yoel Ren

Member
Update : found missing rb310 and cb300, and some corrosion there, i have replaced rb310 and cb300, board taking 20v with 1 amps, but display would occasionally show backlight but no caps lock light, is this cd3215 issues?
 

2informaticos

Administrator
Staff member
"does this have something to do with fmdf from mouser/digikey?"
I don't understand the question.
Did you chabge some chips on the board, or just tried another LCD assembly???

Disconnect LCD assembly and test the board alone.
Use USB-C to HDMI adaoter, or just check for continous USB activity; or Caps Lock reaction.

Possibly knocked off components in the LCD swap process, or broken traces...
 

Yoel Ren

Member
Sorry i mean fdmf chip ,
Let me get this straight
The chronology; i bought this board from someone refurbished, i used this board to test another lcd assembly, after reassemble , it stuck at apple, i keep trying to restart and it suddenly freeze and i seen some red artifact at the screen, and its the last time i have seen image on the screen.. and it end up at only backlight, no image, without external video , no caps lock reaction too
I open the board and see some corrosion on cd3215 which i mentioned above, but that shouldnt have anything to do with image ? Because i have 20v. Does this have anything to do with dead cpu output or this is no brain?
 

2informaticos

Administrator
Staff member
I still don't see the reason of that question.
Did you change any FDMF5808 chip???
If not, why menrioned an online store then?

Video artifacts can be generated by RAM, or CPU...
 

Yoel Ren

Member
No i don change any fdmf5808 ,sorry I just thought there’s some correlation about sudden dead with that chip..
So is there anything i can do to solve this braindead?
 

2informaticos

Administrator
Staff member
Heat RAM, or/and CPU; use quality flux.
No need to melt the balls, just to burn eventually crap acumulated underneath.
 
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