G531f dead boot usb only

       SM-G531F Dead Boot Repair

                                        1.Find test point on board

download link 

https://drive.google.com/open?id=1UFDIvNeLZL05ho90-jUcesQnCbxIrcHk

2.short test point

3.Your computer should recognize your phone as Marvell device.

4.At this point open the download tool and select Recovery Boot.bin, and flash it.Once flashing complete, re assemble your phone and try to switch on, phone should enter download mode Now flash normally with ODIN.