samsung s8 and a530 not going download mode
 

Any help with putting A530 into download mode.
it had MDM. MDM is removed.
vol+ and vol- and power not working
Z3x reboot to download not working
diconnected battery also no result
the phone reboot to normal mode.

vol+ and vol- buttons working perfect.

Sam s8 it has lock screen,cant boot download mode.
tried z3x, batt drain,vol- and bixby button also fail.

regards