...My money is its the PS. Try replacing it first. Its easy to do, its cheap and if it doesn't fix the issue, take it back.
Ok lif i assume its the power supply.And i do have a tone of dust in there.how would i figure a new one out.Here is hp part number 5187-4874-SPEC Power supply - 230 watt, regulated (Darth Maul) i have 2 extra power supplys here.Both fit 2 old machines i have.Hp one after take out is way bigger HELP!