Is it the IDE port or the PSU?

[CrashBandicoot]

I am building a system with used components.Mainly as a media PC.The problem i am facing is a bit strange.I have to connect an IDE hard disk and an IDE dvd rom to the only IDE port of DFI lanparty mobo.
Both HDD and DVD are working and new.When i connect the IDE cable to both or any of them,they wont power up at all.If i disconnect the IDE cable and only connect them with the PSU,they work fine.
Any ideas?

[sunny945]

its ide cable which makes problem
get a new ide cable
your system does not detect any of them ?

[CrashBandicoot]

its not just that.The system wont detect the hdd and dvd rw,and both wont power up with the IDE cable connected.But when i disconnect the IDE cable from mobo,and hadd and dvd are connected only to the psu,buth power up and work fine.

[AFQ]

Have u aligned jumpers correctly?

[CrashBandicoot]

its ide cable which makes problem
get a new ide cable
your system does not detect any of them ?

Thank you so much sunny.It was exactly as you said,the IDE cable was faulty and now that i have changed the cable,everything is fine.

At times like these i feel so good to be a PG member.Help is always at hand,from people who know ins and outs of PC components.
Thankyou all. Now i will ask a mod to close this thread.