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Hi All hope you can help , a friend of mine has a g5 and whats happening is when powered on I get chimes , then the apple logo and cog , the problem being the logo is not grey its got green wavey lines through it , the wheel spins with pixelated green dots , the does not boot but goes to a white screen , then nothing , I think it’s maybe the video card ( if there is one installed ) , if not then im stumped , I am an I.T Tech but mainly Windows , Desktop’s e.t.c so do not hesitate to use I.T language replying ! Thank you for your responses in advance. Shaun. P.S HELP !!!!!!!! lol

Look at some of the responses to this question. Startup problems with this computer are usually caused by defective capacitors on the motherboard. The problem and it’s solutions are explained more in-depth in the link.