Help needed!! My hp comaq 4000 pro small is flashing green at the front and just won't start up

[Mistck]

 

 Here's my computer that I got from a place called cash converters which is basically a pawn shop and it was working just a day ago and now there a green light at the front the keeps flashing and I looked within the computers components and I say a green light near the ram sticks, also when I take off the CPU cable or the 24v cable it starts to attempt to turn on which im only assuming cause the disc tray starts to spool then dies and when every that light flashes, all the fans try to turn on and get power then immediately dies. Please I need someone's help pronto cause I have work files in this computer and I have no other way to take them out, please also suggest anything that I can try. Thank you, regards me, Mistck

[WAWood]

@Mistck 

I'm having difficulties with your post due to term problems.

First of all, a CPU does not have a cable.  The CPU is the Central Processing Unit and that is a "chip" that is mounted on a socket on the motherboard inside the case. That is what folks call the processor.

Second, I don't know what you mean by "24v cable".  There is a power cable that connects the PC case power supply to the wall, but that is not 24 volts.  There are several different cables inside the case that connect the power supply (known as the Power Supply Unit -PSU) to the motherboard and components on it -- and you should not be messing with any of them.  If the PC powered up and ran when you brought it home, those cables were connected properly.

Third, disk trays do not spool -- that is a terms associated with printers.  Disk trays hold optical disks (CDs or DVDs) and those disks spin-up (start to spin quickly) or spin-down (slow down).  So, I have no idea what this "disk tray" is that you are talking about.

Fourth, the files are not in the "computer"; instead, they are contained in a storage device known as a hard drive, which is mounted inside the computer. 

Fifth,  A flashing green light only means the PC will not start up properly and we here have no way of accessing or examining your PC to find out why. To find out why it is not working, you would need to be able to run diagnostics.  If you want instructions on how to do that, then let me know.

Also, the files are not gone, they are still on the hard drive.  So, if all you need is getting access to those files, then let me know and I'll provide information on how to recover those files.

We can proceed when you provide the information.
Thanks