I have almost same problem. This problem start one time when I using my computer. Computer always stop after trying restart, sometimes start normally and stop after few second. And now when I start computer I have Code on motherboard: before starting:5., 0.1. : after starting : 8.3., 9.C., 9.E. and 9.F and computer stop

Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up a computer hard drive

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your ((motherboard to your hard drive)) make sure they have a secure connection and are not faulty or just replace them there probably old and faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they are probably old and faulty a computer needs its connections to have an end so any faulty leads will end up with a computer error
make sure that your RAM is securely seated

hope this will help
don