ATX power supply troubles

I just put in a new ATX power supply for my computer. The problem that I am stumped on is that when I power up the computer, the power supply and the CPU only run, no lights or power go to the other drives. I have only a 20gig HDD, a CD-Rom and a floppy.
everything has been reassembled and reconnected multiple times to double check for a misconnection. Is there a trick I need to know?I need help!

AMD Athlon 500
8x cd-rom
64 meg ram
20 gig HDD
3.5 floppy
runs on Windows 98
ATX power supply 250watt brand new- AMD Compatiable
ran previously on an AT powersupply until it gave up the ghost.

1. RE: ATX power supply troubles
lbyard Jan-22-02 07:42 AM
In response to message 0

Is the switch on the back set for 110 Volts? Larry

2. RE: ATX power supply troubles
eol Jan-22-02 06:57 PM
In response to message 1

The back set is set at 110 volts. There are also no screws that interfer with the circets on the motherboard...everything is secure.

3. RE: ATX power supply troubles
lbyard Jan-22-02 07:06 PM
In response to message 2

What happens when you remove all of the flat cables from the computer and leave the power connectors connected to the drives? Do you have a Multimeter? Larry

4. RE: ATX power supply troubles
eol Jan-23-02 00:22 AM
In response to message 3

I removed all the flat cables. There was power to the floppy, cdrom, but I was unable to see if the power had reached the HDD.
I do have a multimeter.

5. RE: ATX power supply troubles
lbyard Jan-23-02 06:22 AM
In response to message 4

You should be able to hear the hard disk drive spin-up. Disconnect the power before reattaching cables. The flat cable to the hard disk and CD-ROM drive connect so the stripe on the cable goes toward pin one on the motherboard and towards the power connector on the drive. The flat cable to the floppy is connected with the stripe towards pin one on the motherboard and it depends on the drive manufacturer which way it connects to the drive. If the floppy drive LED stays on, the cable is backward. AT/66/100/133 hard disk cables are connected per http://duxcw.com/digest/Howto/buildcom/socka/10.htm, which also explains the other cables. Larry

6. RE: ATX power supply troubles
eol Jan-24-02 02:54 AM
In response to message 5

I was able to get power to everything...the computer will boot up now. However a larger issue has come up.
I have several corrupted files that I cannot fix because my floppy will not read disks. The light flickers when it boots up, as it should, but put a disk in, it will not bring up the information. It will crank, but no product from it.
I need to reload windows, but I cannot do that until I can get my floppy to work. Everything is connect as it should be.

7. RE: ATX power supply troubles
lbyard Jan-24-02 06:43 AM
In response to message 6

http://duxcw.com/faq/fd/fd.htm, Larry

8. RE: ATX power supply troubles
eol Jan-25-02 02:16 AM
In response to message 7

I looked over the information and double checked my bios...everything is as it should be. I am confident that there is nothing wrong with the floppy drive( I hope!). Any other suggestions? Thank you for you help so far! You rock.

9. RE: ATX power supply troubles
lbyard Jan-25-02 07:23 PM
In response to message 8

All of he suggestions I have on troubleshooting floppy drives are in the FAQs. We do not know that the drive is Ok unless other floppies, etc. I would try the drive on another computer. Larry