Display Information: "Contact Service - Nokia NHM-8NX Series Troubleshooting Instructions

NHM-8NX
Troubleshooting Instructions

Display information: "Contact Service"

This error can only happen at power up where several self-tests is run. If any of these test
cases fails the display will show the message: "Contact Service".
It's individual test cases so the below lineup of error hunting's has no chronological
order. Use common sense and experience to decide which test case to start error hunting
at.
Display shows
"Contact Service"
Yes
Page 10
EarDa & MicDa
between
UPP and UEM?
MBUS interface
between
UPP and UEM?
AuxDa & UEMInt
between
UPP and UEM?
SleepX & SleepClk
between UPP & UEM?
TXI/QD & RXI/QD?
SIM interface between
UPP & UEM
Key is stucked
Flash checksum
Ÿ
ASIC version vs. compilation flag, PMM checksum
Ÿ PMM validity
Ÿ
Warrenty Information State
Ÿ SIM-Lock
ãNokia Corporation
PAMS Technical Documentation
No
R205
Check R205
(no short/open-circuit)
Check :
A-cover, Keymat, Lightguide,
PWB.
Reflash phone
Check :
PWB.
Else defective D200*
or D400*
Error still present
Check :
PWB.
Else defective D450 (FLASH)
Issue 1 05/02