Nokia C7 display problem

[erictcchang]

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I have a Nokia C7.My problem is when i received a call or after dailing a number and i press the call button,the whole phone display go blank.Anyone can tell me what is the problem?

[Siddharthr]

Well I think you need to Hard Reset your mobile phone and you ll lose your data. Before going ahead with this I will suggest you to visit to the nearest Nokia Service Center. Explain them all your porblem they might able to fix your phone.

[erictcchang]

Thanks.what do you meant by hard reset?Do you mean reformat the phone and reset to factory setting?