May just need the relevant drivers re-installing.
Go here to download the drivers for Bluetooth and Wireless for your model. There are three models in the 430 series. Be sure to choose the right one (look underneath the laptop for the full model name): http://h20000.www2.hp.com/bizsupport/TechSupport/ProductList.jsp?lang=en&cc=us&taskId=135&prodTypeId=321957&prodSeriesId=5086733
Both drivers are in the "Network" section on the drivers page.