KW88 black screen and wont turn on

KingWear/AllCall Products KingWear KW88/KW98
1

I like to get some help because my KW88 wont turn on anymore after a factory reset and OTA update. The screen remains black. When i connect it to my pc through USB, it keeps connecting and disconnecting.

So i cant try to flash it.

Here is a video to Youtube with my video:

Hope someone can help out.

2
Dec 11, 2017 11:34:14 GMT 1 wesselvdwaa said:

before the updates the watch worked fine? try to disconnect the battery and try again and hold tied the cable to the watch, it also might that the cable does'nt work anymore.
3

Dec 11, 2017 13:14:12 GMT 1 soniasophie9697 said:

Dec 11, 2017 11:34:14 GMT 1 wesselvdwaa said:

before the updates the watch worked fine? try to disconnect the battery and try again and hold tied the cable to the watch, it also might that the cable does’nt work anymore.

Thank you for your reply!

I tried disconnecting the battery. Also tried to drain it. And i tried your way to push it on the main board. All the same
The cable is working fine. I use it on another watch.

Any more ideas are most welcome.

4
Dec 11, 2017 22:47:21 GMT 1 wesselvdwaa said:

Dec 11, 2017 13:14:12 GMT 1 soniasophie9697 said:
before the updates the watch worked fine? try to disconnect the battery and try again and hold tied the cable to the watch, it also might that the cable does’nt work anymore.



Thank you for your reply!

I tried disconnecting the battery. Also tried to drain it. And i tried your way to push it on the main board. All the same
The cable is working fine. I use it on another watch.

Any more ideas are most welcome.


can you flash it with the stock rom?

5

Dec 12, 2017 1:40:12 GMT 1 soniasophie9697 said:

Dec 11, 2017 22:47:21 GMT 1 wesselvdwaa said:
Thank you for your reply!

I tried disconnecting the battery. Also tried to drain it. And i tried your way to push it on the main board. All the same
The cable is working fine. I use it on another watch.

Any more ideas are most welcome.


can you flash it with the stock rom?

No i can’t. Because the pc wont see the watch. It keeps disconnecting and reconnecting

6
Dec 12, 2017 10:53:30 GMT 1 wesselvdwaa said:

Dec 12, 2017 1:40:12 GMT 1 soniasophie9697 said:
can you flash it with the stock rom?


No i can’t. Because the pc wont see the watch. It keeps disconnecting and reconnecting

try to disconnect the battery and flash the watch. if you still having problem try again to if you can install the usb mtp again and if it helps.

7

Dec 12, 2017 11:10:53 GMT 1 soniasophie9697 said:

Dec 12, 2017 10:53:30 GMT 1 wesselvdwaa said:
No i can’t. Because the pc wont see the watch. It keeps disconnecting and reconnecting

try to disconnect the battery and flash the watch. if you still having problem try again to if you can install the usb mtp again and if it helps.

Hey Sonia (and others that like to help).

I’ve tried what you said. Also reinstalled the USB driver. Still it keeps connecting and disconneting straight away. 
Because of that the flashing program won’t see the watch and i can’t flash.

I hate this. How can this happen after a factory reset and update ota

8
Dec 14, 2017 20:15:48 GMT 1 wessel said:

Dec 12, 2017 11:10:53 GMT 1 soniasophie9697 said:
try to disconnect the battery and flash the watch. if you still having problem try again to if you can install the usb mtp again and if it helps.


Hey Sonia (and others that like to help).

I’ve tried what you said. Also reinstalled the USB driver. Still it keeps connecting and disconneting straight away. 
Because of that the flashing program won’t see the watch and i can’t flash.

I hate this. How can this happen after a factory reset and update ota


it happens even if the battery is disconnected? when i flash my kw99 i have to hold the charger to the watch so it wo’nt disconnect even with the s1 same thing, the connection is’nt that great with these cables.

9

Dec 14, 2017 20:30:13 GMT 1 soniasophie9697 said:

Dec 14, 2017 20:15:48 GMT 1 wessel said:
Hey Sonia (and others that like to help).

I’ve tried what you said. Also reinstalled the USB driver. Still it keeps connecting and disconneting straight away. 
Because of that the flashing program won’t see the watch and i can’t flash.

I hate this. How can this happen after a factory reset and update ota


it happens even if the battery is disconnected? when i flash my kw99 i have to hold the charger to the watch so it wo’nt disconnect even with the s1 same thing, the connection is’nt that great with these cables.

Yes. It still happens when i push it on the mainboard. Any other way to help?

10
Dec 14, 2017 20:41:00 GMT 1 wesselvdwaa said:

Dec 14, 2017 20:30:13 GMT 1 soniasophie9697 said:
it happens even if the battery is disconnected? when i flash my kw99 i have to hold the charger to the watch so it wo’nt disconnect even with the s1 same thing, the connection is’nt that great with these cables.


Yes. It still happens when i push it on the mainboard. Any other way to help?

i’ll check…
edit: did you try also to install drivers again?

11

Dec 14, 2017 20:55:58 GMT 1 soniasophie9697 said:

Dec 14, 2017 20:41:00 GMT 1 wesselvdwaa said:
Yes. It still happens when i push it on the mainboard. Any other way to help?

i’ll check…
edit: did you try also to install drivers again?

Yes i did

12
Dec 14, 2017 21:02:50 GMT 1 wessel said:

Dec 14, 2017 20:55:58 GMT 1 soniasophie9697 said:
i’ll check…
edit: did you try also to install drivers again?


Yes i did

Are you flashing the watch while it is powered off?

13
Dec 14, 2017 21:28:14 GMT 1 RASC Moderators said:
Dec 14, 2017 21:02:50 GMT 1 wessel said:
Yes i did

Are you flashing the watch while it is powered off?

Yes. And i've fixed it. I tried it on another PC and it worked. It is working again. Thank you all
14

I have the same problem. the black screen of the watch, the usb connects and disconnects.
Can you describe me step by step how you fixed your watch?
Regards