Hi there and welcome
Can you remove the battery and power cable then hold the power button down for 60 seconds then release.
Once done, connect the battery and power cable and tell me please if it now turns on.
ok, leave out the battery then try with just power please
yes, with no battery please
no, try to turn it on with no battery in it please
and tell me if it starts please
ok, put the battery in but leave the power cable out
Does it then start?
No, its ok
It is the motherboard that has faulted, We have ruled out all other causes for this
I am really sorry about this and you are going to replace this, although I would strongly suggest to replace the entire laptop as one this old is going to be very hard to source the motherboard. You did get good use out of this though. But the motherboard has failed sorry (will be the video card on it)
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.
your most welcome, if you need anything else, please let me know
And please remember the service rating