What you should first do is refer to the manual. (Your question suggests that you have not read the manual.)
What you should do next is work out what model you have and then Google it for issues. If that does not help you then do not be timid in taking it back to Argos.
If the replacement from Argos does not work then get your money back and go elsewhere
Bush is a UK brand owned by the Home Retail Group, the parent company of Homebase and Argos. Electronics branded as 'Bush' are made by different manufacturers and can behave very differently.
'How to mend it' recommend that you state the make and also the model in the question title. You have chosen not to do this. This makes it difficult for others to help you. E.g those with a model of XXXX will not know that you are also asking about XXXX.
Your loss.
NS
February 2013
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