Power on after HD replacement.

If this is about hard disk drive SMART (Self Monitoring) warning. Acer Aspire 3680 BIOS does not have an option to turn off this warning. Basically, your hard drive is dying and you need to replace it with a good working hard disk drive because sooner or later your hard disk drive will stop working. You can clone your hard disk drive using an hdd cloning utility such a Farstone Clone Drive.

just means its time to backup all your information, as if the hard drive does fail theres a good chance you may lose some or all of your information.
hard drives aint that expensive around 30 pounds +
and you can replace it with any sata hard drive.

Save your data asap and replace the drive it's failing. All drives fail over time you are lucky in that you are getting a notice. Others are not as fortunate.

Hi,

This is clearly an indication of a hard drive failure. Though your system may still be booting up it is highly likely that it will stop very soon. Back up your files to a different file location (e.g. external hard drive, online backup) before it happens. Replace the hard drive and seek computer's manufacturer if system is still under warranty, otherwise simple buy a replacement hd from staples or best buy and seek technical assistance if you can't replace it on your own. Hope this helps!

SMART is used to measure your HDD health.It warns you of impending failure of your hard drive. If it goes down, it's a good idea to backup important stuff and prepare to replace the HDD.

S.M.A.R.T is an acronym for Self-Monitoring, Analysis and Reporting Technology systems (SMART) and it's usually built in to most modern ATA and SCSI hard disks.
If you need further assistance, feel free to ask. If this answers or solves your issue, please rate it. Thanks, Joe

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

A smart failure warning is an internal hard disk drive self-diagnostic that will help predict a failure of the hard disk drive. Any system that is displaying a SMART error should immediately have any important data backed up as the drive is not reliable and is impending failure if it hasn't failed already.
Resolution is hard disk drive replacement, Generally around $100 depending on size and speed of replacement HDD

SMART or smart or S.M.A.R.T. stands for - Self-Monitoring, Analysis, and Reporting Technology or S.M.A.R.T. it is a monitoring system for computer hard drives to detect and report on various indicators of reliability, in the hope of anticipating failures. Heed the warnings. Do not ignore them.

usually means you have multiple badsectors, it can be repaired using your HD manufacturer bootable cd but usually its just a matter of time before it rolls over and dies. your best option is to image the drive with something like clonezilla or just backup your important files to a cd or dvd and buy another HD off a site like newegg.

SMART is the system that monitors the health of a hard disk, in your case  it's close to complete failure. Follow immediately what that warning message says - copy all your data to some DVD's, replace the hd and reinstall.

SMART means self monitoring and reporting tool, this is the option which performs certain test for the status of hard disk health, if its coming it means condition of your hard disk is not good, its better if you immediately back up your data and replace it, by the way you can also disable this warning through the bios, just disable the smart feature in hard disk

Solution #1 is grossly incorrect. The S.M.A.R.T. mechanism is software/application/drive content agnostic. It is a firmware-based predictive failure feature. If the S.M.A.R.T. test returns a certain bit, then the drive is degrading and in need of replacement. If the disk is under warranty, then it generally qualifies for free replacement. If it is not under warranty, then you can run diagnostics such as http://www.santools.com/smart/unix/manual which can sometimes identify the specifics. Sometimes the problem is transient, like the disk was powered on/off too many times in a short amount of time, or the temperature is too high.