Storage Solutions Seagate 250gb hdd not being detected

[teracore]

Just bought a 250gb seagate sata hdd(internal). Its not being detected in windows xp or seven, not even in bios. Though its working in some other pc.

I have already 80gb seagate sata hdd (main)

I also have a WD 160 gb hdd which my system is detecting. I use only 80gb one and i use 160gb hdd for backing up data. Its also internal.

I have a Intel 915GEV mobo (4 sata ports) and a 400W Iball PSU.

Could it be PSU? Because its a crap psu. Bought in 2005.

I have tried almost everything( checked diskmanagement, nothing is there. Also tried changing cables, still not working)

 

[madnav]

disconnect all drives and connect only that drive.. see if its detected by bios...

If yes.. then psu is the culprit.

 

[teracore]

Yeah i tried that. Bios was detecting it(the new 250gb one, other hdd disconnected) earlier, now its not.

 

[HailStonE]

Back up data if you can & then RMA... Pray you get a new replacement 'coz Seagate is now providing "Certified Repaired" against RMA....

 

[krackzit]

..........................

 

[madnav]

Yeah i tried that. Bios was detecting it(the new 250gb one, other hdd disconnected) earlier, now its not.

in that case.. its your PSU that is incapable of powering all at once.