NXT ultrasonic sensor problem

[dumba16]

I guess there is some hardware problem with my NXT ultrasonic sensor , there is a try me option and when I try it to use ultrasonic sensor it makes sounds when something gets close to it ( now it only makes sound when I put something extremely close to it ), other than this it has an option to measure distance in cm , but it can measure no more than 7 cm wheras the booklet that came with it says that it can measure lenghts upto 255cm .

Anyone had this problem before ?? or can you help me out ?

Thanks in advance

[WearWolf]

Hello dumba16,

What software are you using to test the device? What firmware are you using? Are you using an example program? If the program is an issue you could post the code so that we can verify its functionality. Have you been able to get any other sensors to work successfully?  If the device is malfunctioning you may want to contact the vendor that you purchased the device from.