HI, I have a htc desire 500 - single sim. when its start button pressed or when it connect to charger it vibrates 7 times, stops, 7 vibrates again and again.
i searched the web and i found it is a mother board problem. but day i let it to be connected to charger and suddenly it starts and for one week it was good, until the charge gone and it turned off, now the same problem again and again.
actually i like to fix it myself (a hobby) other than to give it to a service repair. so i hope you can help me