Hi berni967, Can you answer a few questions for us so that we have more facts to help you:
Exactly what model is your sons PC?
What operating system does the PC use? ie XP/ 2000/ WinME/ Win98
What was the last thing being done on the PC and when was that...ie was it used last night for something and turned off ok?....if so what?
have you been experiencing any other problems with the PC before the current problem happened?
have you moved the PC lately?
can you hear any 'Beeps' when you turn the pc on at the plug socket? If so how many?
Can you 'hear' the hardrive 'chattering' when PC is turned on?
Can you see the hardrive light flashing in the pc casing?
have you tried unplugging and plugging in again all peripherals to the PC such as printers scanners?
can you unplug all of these (including mouse and keyboard) and turn PC on via the ON switch please.
If PC starts up ok you need to put one peripheral item at a time back onto your pc to see if the pc then turns on again properly.
Have you put anything new such as memory sticks into your pc recently?
I've googled emanchine370 and it seems they sometimes have motherboard problems. If this is so you need to wait for someone with more pc knowledge than I have.
here's the emachine help page I found:
I'm sure someone will be along to help you.