On 19-08-2010 17:32, John Gilbert, gilbert2330 at earthlink.net, wrote: > My G4 has given me about two years of faithful service until recently. > Beginning about a week ago, it began crashing, giving me a black screen > message stating I needed to hold the restart button, turning it off. Then > restart. > > Before last week, this had never happened. > In the past week, it has occurred wayyy too frequently, almost three or four > times a day. > > Is my power supply going? > Could there be another reason? Hello John, Please start with giving us more info: 1) Which G4?? Laptop, Mini, eMac, iMac or PowerMac?? 2) Which OS?? 3) How many RAM?? 4) Etc. Jo Hissel