I can help you to solve your problem, just follow the next steps:
1.- Get the unit into the “Support Menu” by following the steps below:
A.- Press and hold the “*” and “#” keys at the same time then release both keys.
Display should say “Enter Special Key Combo”
B.- Press and release in sequence the “1”, “2” and “3” buttons.
Once in the menu, follow the next steps:
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2.- Press and release the right arrow button twice.
3.- Display should say “System Configuration Menu”.
4.- Press and release...
