Everything work so good in my desktop pc i was using windows 10 then suddenly when i restart my pc the display was hazard signal display. I cannot believed because i i just replace new biostar mother board and a new AMD A6 7480 processor to my computer. The old parts i was still using are the casing , 4g ram , hard drive 160G. I try to find the trouble what had happened to my new pc. Then i find some technical problem. The 4g ram is old and sometimes they need replacement. Before i want to replace a new ram i have to try some solution. Easily the solution was eraser. I use eraser to white the golden circuit board of the ram from the front and back. It took me just 1 minutes then i put back the ram into my pc. It works well and now i am happy.