User guide
12
After Sales Support
UK/N.IRELAND HELPLINE N
O
:
REP.IRELAND HELPLINE N
O
:
WEBSITE:
EMAIL: 
01270 508538
1800 995 036
www.quesh.co.uk
enquiries@quesh.co.uk
FAQ
Problem Cause Solution
No power. The car ignition is switched 
off.
The fuse is blown.
If the power supply is properly con-
nected, switch the ignition key to 
ON or ACC.
Replace the fuse according to the 
wiring diagram.
Error on LCD display or no 
function when buttons are 
pressed.
Inbuilt processor is not
operating due to noise.
Fascia is not mounted
correctly.
Press the RESET button.
(See page 6.)
Reattach fascia correctly.
Poor or no radio
reception.
Loose connection /
Not connected.
Poor reception area.
Bad earth connection.
Internal vehicle aerial.
Check aerial connection on the 
back of the unit.
Manually tune in station.
Check the cradle has a rust free, 
tight connection to the vehicle’s 
chassis.
3rd party signal booster maybe
required.
Auto scan does not stop at a 
station.
Transmission signal are too 
weak.
Manually tune in station.
No sound. Volume control set too low.
The device has not been con-
nected properly.
Turn up volume properly.
Check wiring according to the
wiring diagram.
MP3/WMA les on USB or 
SD/MMC do not play.
Storage greater than 8Gb.
Incorrect le format. (NTFS)
The music les are DRM 
protected.
Use a USB, SD/MMC storage 
device with no greater storage 
capasity than 8Gb
Format the storage device into 
either FAT or FAT32 le format.
This unit is not DRM
compatible.
Bluetooth not working. Bluetooth module locked up. Disconnect and reconnect ISO 
cable.
Device connecting via 
bluetooth but not functioning.
Bad pairing prole on device.
Bluetooth version not com-
patible
Delete the pairing prole off of your 
device, press RESET on fascia (see 
page 6.) and re-pair device.
No solution.
Please Note:
AM band services are being reduced and this will affect certain areas.










