bbs.blackview.com

Hi Blackview,

Please help! My BV9500 pro cannot boot up. It keeps on flashing the “Blackview” screen every 20 seconds or so with black background but doesn’t go any further. I tried drain the battery and then recharge but still the same. What to do?  Help please!  Thank you!

Can you boot it up in recovery mode as showed here? 
http://bbs.blackview.hk/viewtopic.php?f=192&t=334922

Deau,
I agree to try the recovery mode first,

However, if you're still having a problem getting your phone to run either recovery or as a phone and
if your warranty has ran out (usually after 1 year of ownership) then mention here and I'll try to help you
figure out if you can get your phone back to a usable state.





P.s. a note to the blackview admin(s) however, I've noticed what seems like a firmware signing bug can cause this with signed boot images on the BV9500 in some cases.
I use the older pre-loader binary pulled out of an OTA package from 29th Aug 2018 to work around these.
Also on other brand phones, I've found a bad eMMC chip to cause similar havok, so it'd be something for your devs to think about for all future phone updates, for example, apply the updates twice before rebooting (i.e. write the boot and recovery partitions twice and verify they have written based on the SHA256 sum of those partitions and either re-write on fail or reboot on success, this should get around failing eMMC/storage)

What I would do first, is to check that the volume + and - keys/buttons work freely. It could be that one of these buttons is stuck, preventing you from booting up the phone accordingly.

bpz1970 wrote:

What I would do first, is to check that the volume + and - keys/buttons work freely. It could be that one of these buttons is stuck, preventing you from booting up the phone accordingly.

+1

blackview_admin wrote:

bpz1970 wrote:

What I would do first, is to check that the volume + and - keys/buttons work freely. It could be that one of these buttons is stuck, preventing you from booting up the phone accordingly.

+1

You're right.  The volume buttons are not working properly.  Occasionally now when it's able to boot up but then increase volume button doesn't work, only the decrease volume work. But all of a sudden the volume would increase suddenly without touching the volume buttons.  What is causing that and how to fix?  Thank you.

Deau wrote:

blackview_admin wrote:

bpz1970 wrote:

What I would do first, is to check that the volume + and - keys/buttons work freely. It could be that one of these buttons is stuck, preventing you from booting up the phone accordingly.

+1

You're right.  The volume buttons are not working properly.  Occasionally now when it's able to boot up but then increase volume button doesn't work, only the decrease volume work. But all of a sudden the volume would increase suddenly without touching the volume buttons.  What is causing that and how to fix?  Thank you.

I suggest you to contact your seller to have the unit replaced\repaired under warranty... if warranty still runs. Let me know.