What were the input options set to on the preset you were trying when using a normal guitar Did they list GUITAR as one of them?  I assume you were using the GUITAR input on the HD500 for the normal guitar? ... and therefore you need to have GUITAR listed as an input for the preset.  If GUITAR is listed as an input option on the preset and you still can't get any sound out of the preset then you could have a faulty HD500.   You can also try using the AUX input to input guitar on the HD500 - ensure it is listed as one of the input options and see if that works - if it does then that will at least narrow the fault down to the GUITAR in jack on the HD500.