CNC pc red light and won't turn on!

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Pete.:
The fan spinning for a moment is normal. It does that until it gets a 'power good' from the CPU and if it doesn't get that or doesn't understand it (see below) then it shuts the PSU down.

Does it beep?
Does it put anything at all on the screen?
If the answer is no to both then it's not POSTing (Power On Self Test) which points at the CPU, motherboard or BIOS. If it was memory you'd get a load of beeping. There's a slim chance that pressing reset during POST might have corrupted the BIOS, some are recoverable others not (easily).

You'll have to tell us your motherboard type before we can help with that.

Fergus OMore:
I did a 'Gumtree' for a PC tower a few minutes ago- All of £25 for one that is running OK.

It costs £50 from PC World to put a bloody awful Windows 8 back to Windows 7. No prizes for guessing!

lordedmond:
pull the HDD and all other drives that are connected to the MB

it should post but complain that there are no drives , if it posts F1 or Del key to get to the bios ( been on macs for along time now but i think the key press is OK )

if it will not post there are only three things left

you have proven the PSU so OK

bad CPU , bad RAM ( you should get a post beep error code ) and last a duff MB

But has as been said get that HDD out and do not fiddle with the PC with it in if it has data that you want on it

happy new year Chris but it looks like a dead PC

my history with PC before I went mac started in the zilog z80 days

but I bet you know what my parting shot is to be

There are those that back up and those that will

Good luck and I hope your data is intact

Stuart

kayz1:
What MB Chriss? i have a few in the cupboard here and CPU's old memory that sort of stuff from when i used to mend PC's for a mate.
Lyn.

Pete W.:
Hi there, Chris,

I'm sorry to hear of your problem - we have a saying in our household 'Computers are FUN, FUN, FUN!!!!!'.

A word of caution - if it is the 'C' drive, containing the operating system (i.e. Windows), you can't just transfer a loaded hard drive from one computer to another. The Windows installation process sort of tailors the operating system to that motherboard and that tailoring is further increased when the drivers are installed (i.e. chipset drivers, graphics and sound drivers, Ethernet driver etc., etc..

The following assumes that the hard drive in your poorly computer is OK.

In your situation, I'd remove the hard drive from the duff computer and either install it into an external hard drive enclosure with a USB interface or attach it to an external USB harness (they usually come with a PSU for the hard drive). Power up another computer (the 'host' computer) with lots of hard drive space available, power up the 'refugee' hard drive and then connect the USB connection. It might take a few minutes but eventually you should be able to see the 'refugee' hard drive in 'My Computer' on the host machine. (Because the host machine was booted first, it will run from its own operating system and shouldn't get confused by the second operating system on the 'refugee' hard drive.)

You should now be able to see your CNC files and stuff and copy them (NOT the operating system files!!!) over to the 'host' computer hard drive for safe keeping. You could also burn them onto a CD - this will facilitate getting them on to any new computer you get or build to replace the CNC machine.

If you now decide to build a new CNC machine, using the hard drive from the old CNC machine, the Windows installation process will include reformatting the drive. You will also need to know the identity of your new motherboard so you can get and install the appropriate drivers.

An external hard drive or two can be extremely useful in all sorts of computer manoevres, not just for back-up. So can an external harness or enclosure. We often get asked to purge the hard drives from computers that friends are scrapping - I have software that REALLY, REALLY does wipe the hard drive and I run that with the subject hard drive attached to my computer via an external harness and USB adaptor.

My lovely but shy assistant is pretty fluent with Windows and used to rescue a lot of our friends from their computer problems. She's trying to run down that activity now as we're both getting on a bit. Still, if there's anything we could do, please feel free to PM me.

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