Hi there and welcome
Can you remove the power cable then hold the power button for 60 seconds then release.
Then connect the power cable, and try to turn it on
Tell me if it then starts correctly please.
Ok, can you start the computer and keep tapping F8
Are you able to get to a menu?
It is the internal motherboard that has faulted.
We have ruled out all other causes for this. It is not indicating an issue with the hard drive, so your data is still safe.
I am really sorry about this and you are going to have to return the ideaCentre to have this replaced. It will be covered by the warranty if this has not expired, and the replacement will be done at no cost to you.
I am really sorry about this, and if you have problems, or would like any additional information or assistance, please do not hesitate to let me know.
And if you can take a second to rate my service, that would be greatly appreciated.