My laptop Dell Insp N5110 Window 7 OS, recently started giving problem like " SELECT PROPER BOOT DEVICE OR INSERT BOOT MEDIA IN SELECTED BOOT DEVICE". And this problem will show only for few hours after few hours if i restart it will work properly. I read some answers in this forum for same problem and done "Integrated NIC -Disabled" it dint worked. When i did diagnosed then it is showing error something like " Hard disc HDD not detected" but after few hours if i restart is working properly with no booting problem.
Could you please tel why this problem?. even i not have any backup of my data.Is my HDD is dying?
Your hard drive is likely failing. If you can get the system running, make a backup NOW. If you can't, you can try removing the the hard drive, mounting it in external case and attaching it to a working system to see if you can read it. On this model replacing the drive is not easy - it requires removing the mainboard from the system, so you will likely want to have a new drive ready to go when you remove the old one. See video: