Sp Flash Tool Error Status Ext Ram Exception Link -
Many advanced users overcome the "Ext RAM Exception" by bypassing the preloader update.
Oscilloscope on DRAM VDD (1.1V–1.3V) and VREF — droops cause exceptions. sp flash tool error status ext ram exception link
If you have ruled out all software causes, the phone’s physical RAM chip may be desoldered, cracked, or short-circuited (common after a drop or liquid damage). Many advanced users overcome the "Ext RAM Exception"