How can i fix my hotpoint tcl770 tumble dryer - keeps having flashing light?

How can i fix my hotpoint tcl770 tumble dryer - keeps having flashing lights, i emptied the water, cleaned the filters, and it still flashing all the lights, if i knock it off and then back on it works for a couple of mins and then it goes nuts and starts flashing all the lights, i about 2 weeks out of warranty, so really gutted, any help would be greatly received