ok so i think ive tried just about everything to get my damn computer to work right. Im seriously tearing my hair out every time i put a disk drive in it wont let my computer boot or it comes up in the bios as some wierd writing like "$%^LED" i dont know if thats exact but thats kinda what it says. and now i really dont know what to do ive changed the pin from cable select to slave to master and even taken it off on all the drives. changed powersupplys used different cables. im starting to wonder if its my mother board now but i dont have any money for new parts right now since the army doesnt pay the best and i got other **** to buy. but enough of my ranting can any body please help me!?

come on some one has to know any help?????

Things you could do:
 
Reflash BIOS
Try a different DVD RW
 
Can you USE the drive correctly?

Try starting with complete specs, how are we going to make any guesses (because that's what they are) if we don't even know what you have?

ok specs are
 
amd 3700 64
abit KN8 sli
antec power 550 watt
nvidia 7900gtx 512MB
1 gig kingston performance ram
western digital 250GB harddrive
and iv tried like 7 dif cd/dvd drives and none will work they always make it so i cant boot it just stays as a black screen. so i think thats all my specs if i missed any let me know.

Verify these assumptions/answer questions.

1. It's a new build.
2. SATA or PATA HDD and DVDs?
3. You have booted to BIOS with HDD connected and it is recognized properly?
4. You have set fail-safe defaults and rebooted.
5. You are connecting the blue end of the IDE PATA ribbon cable to the motherboard, assuming PATA DVDs?

1.its not a new build been up for almost a year.
2. SATA HDD but my disk drives are all the IDE ones
3.yes tried failsafe and optimal settings in bios
4. was reconized at first now it isnt.
5.yes ive connectied the right end to the motherboard.

That's enough information for me to make a guess. You said it was working so I have to assume that you have it strapped for master and installed at the end of the cable.  Either you have a bad ribbon cable, or your mobo is screwed up. I'm assuming you changed ribbon cables so I have to blame the mobo. If you can throw a HDD on the PATA and it recognizes it, then I don't have an answer. One thing to do, that would be cheap, is to pick up a cheap SATA DVD-RW OEM for about $30-$40. You will need a SATA cable. Assuming it is your mobo, that will be cheaper than buying a new mobo. As I said, try a new ribbon cable first, if you haven't already.

Wouldn't a setting in bios cause this? Like say having raid enabled on the ide channel?
Did your system just one day stop booting with the cd/dvd drive installed?
Maybe you could fill us in on how this situation came about....

The RAID won't cause gibberish in the BIOS on the Standard CMOS Features page. Additionally, RAID is available only on the SATA ports not the PATA. Not that it applies, but RAID is also disabled on the SATA ports by default.

One other thing, that I suspect you have tried and it's somewhat of a long shot, is to manually default the CMOS (see pic). If you want to go to the last step, unplug all USB mobo headers, the HDD, floppy and any other USB stuff plugged into the back panel except the Keyboard. Leave only VGA, DVD, Keyboard and fans and try to boot. If that fails, to be sure it's not the keyboard, swap with another temporarily, and boot again. Longshot but worth a try.
 

alright guys thanks for the help but i figured it out....after an hour of tinkering and like 4 drives later i descovered that when i have 2 devices pluged into a certan cord from my pus it causes it to short out.....so now i am left with 4 defunct drives..... but oh well thx for the help ill def. be comming back here for it again some time. thanks guys

Glad you figured it out.

I really feel bad about your problem. Better you disassemble your computer and try to assemble it properly or else you get some help from hardware engineer.