My Dell model is Inspiron 14 (3421 base)

My old hard drive is 2.5" SATA WD 750GB WD7500 BPVT internal hard drive 

May I know what is the equivalent or compatible oher brands hard drive should I buy, may be 250 to 320 GB storage enough ?

I put in a seagate Momentus 7200.2 120 GB to replace it & I got this message

"internal hard drive not found. to resolve this issue, try to reseat the drive.

No bootable device - strike F1 to retry, boot, F2 enter setup menu, F5 enter PSA"

Is there any Windows 8 home edition bootable CD availiable in the market , for me boot up the new hard drive?

Please advise

Thank you

Any standard 2.5" 9.5 or 7mm SATA notebook drive will work.  If you did not prepare a set of recovery media for your system, you will need to contact Dell to purchase that now in order to load the OS.

Hello and good morning

There is something most definitely wrong. The other reply sounds "spot on."

Apparently you have an "apples and oranges" situation.

Did you check with Dell for compatibly?

You should probably change back to the old HDD and if you can get to your desktop then you have more options to troubleshoot the issue.

More importantly, wait for other forum members to "chime" in with troubleshooting suggestions.

Mark

Thank you everyone for your advise

Dell Said I need to buy any 2.5" 9.5mm thick, 5400 rpm SATA internal hard drive to replace the old one

The problem is I don' thave the OS, to buy original OS cost about $100 over dollars

Is it possible to create installation media for Windows 8.1 from another computer to boot up the new hard drive ?

Windows has this link to create but not sure workable or not ?

http://windows.microsoft.com/en-us/windows-8/create-reset-refresh-media

Anyone can advise

Thank you

I suspect that without a retail CD key you're going to have issues attempting to re-install.