Attention for troubleshooting :
YINENN-850 will not charge:
1,Possibly a faulty USB connector :Check to make sure no dust has accumulated in the charging port.
User may try cleaning the USB connector on the body of the device.
Use of a lens blower is advised.
2,Faulty USB Cable connection:User may try using another similar cable to try charging the
device or may get a replacement cable from the YINENN customer
YINENN-850 will not turn on
1,Device is not charged:If the device is not charged, plug the USB cord into a computer or
into a wall adapter and into the device's mini USB port. Any USB
wall adapter should suffice.
2,Charger cord is faulty:If charge cord not work, the charging cord is faulty and needs to
get a new replacement cord from YINENN customer service team .
3,Battery is faulty:Plug the device into a charger that you know works. If it still
does not charge, then need to contact YINENN to get device replaced
YINENN-850 will not connect to a cell phone via Bluetooth
1,First time connection:Make sure Bluetooth is turned on in settings on desired cell
phone. The cell phone must be within 10 meters of the speaker to
connect and remain connected. Be sure that the Bluetooth button on
the speaker was pressed and that the device then has a blinking
blue light, which signifies that the device is in discover mode.
Search for the Bluetooth device as YINENN-850 in the Bluetooth
settings of the cell phone
2,Unable to connect using any device:Power both the headset and the cell phone on and off to reboot
systems. Make sure that the devices are compatible. Make sure both
devices have all updates installed. Try connecting to the speaker
using a new device by following the first time connection section
above. If you are still unable to connect using any device, you may
need to replace the motherboard.
YINENN-850 buttons will not work
User can let the battery drain completely, recharge the device, and
restart it. If the buttons, such as volume and Bluetooth, will not
work, the device may need to be replaced.
1,If item doesn't turn on ,please suggest customer according to the
user manual or you can transfer the customer to contact us
anytime,our service team will directly contact customer within 12
2,Before start using the headset,customer have to use the USB
charge cable to charge it first,if don't charge,the item won't turn
3,Customer need to push calling button for 2-3 seconds to start
device, then will find the red and blue light flash
alternately,which means item has been turn on .
4,If the someone can't hear the voice when talking on the phone
,customer just need to adjust the volume of headset ,not volume of
cellphone .Or Amazon can transfer the customer to us ,our service
team will assist customer solve the problem within 12 hours .
5,If the item doesn't hold charge ,customer just need to switch
another usb charge cable or different USB adaper to charge ,if the
led lights shows red lights which means the device is being charged
.Or Amazon can transfer the customer to contact us ,our service
team will contact the customer to provide them FREE usb charge
cable from Boston or replace a new device directly .
6,if the item doesn't work or defective ,Amazon needs to suggest
customer contact us ,our service team will replace a new device for
defective item or provide returns lable to refund to customer .
7,if we received any negative feedback ,we have been in contact
with customers and replace the new device for them or refund .
8,we have arranged 3 QC inspectors who is specialized in
supervising our operation to pre-test all the items before
sentshipment to FBA, ensure all the items defective were found
9,we replied to the bu