User Guide

Troubleshooting flow

Dead keys

Context

One or more keys has no function.

Troubleshooting flow

No backlight for display or/and keys

Context

There are 3 kinds of statuses: No backlight for both display and keys; No backlight for only display; No

backlight for only keys.

RM-512; RM-513; RM-514; RM-515; RM-543

Baseband Troubleshooting Instructions

Issue 2 COMPANY CONFIDENTIAL Page 3 –15