what is the best BOX for you to detect hardware

to detect hardware failure on nokia phone,
who will be the best box??
it's depend on you, we make pool here
so better you decide now
example :
log on ufs

error data 6 : ram or upp probably damage or unsolder
product selection mismatch : omap not detected (BB5)

log on jaf
error chk : ram or upp probably damage or unsolder
error loading loader : flash chip damage
some box can show us the error area while flashing or writing flash
and the rest not showing us the error area

for me the best one is UFS...