Roland電子爵士鼓組含Hihat*1（踏板）、Crash*1、Rode*1、小鼓、中鼓*2、落地鼓*1、大鼓*1（踏板）及電源線，使用2年，惟擴音功能異常，電源、傳輸線及音源線皆正常。
Severity: Notice
Message: Undefined index: uid
Filename: modal/messenger_auth_modal.php
Line Number: 33
Backtrace:
File: /var/www/public/application/views/modal/messenger_auth_modal.php
Line: 33
Function: _error_handler
File: /var/www/public/application/views/inc/footer_view.php
Line: 8
Function: view
File: /var/www/public/application/core/Ext_Controller.php
Line: 131
Function: view
File: /var/www/public/application/controllers/Device.php
Line: 562
Function: loadView
File: /var/www/public/index.php
Line: 315
Function: require_once
