Question about E-Machines eMachines Monitor E15T4
The computer can not see the Operating System. This can be caused by several things, so I will just list a few possiblities for you here:
If you have a USB flash drive or external HD plugged into the PC. Remove it while the computer boots. Some machines are set to boot from a flash drive and will search for an operating system on it and display NO OS if the bios can not find one.
If the Hard drive has been removed or replaced recently then the Jumper settings may not be correct on the new drive.
If the computer was having trouble booting periodically, freezing or experiencing blue screens before this message, then you may have HD corruption or possible disk failure. With HD corruption you only need to run chkdisk /p within recovery console in XP or run the Vista recovery center with vista. HD failure is a dead disk, no option but to replace.
Bad RAM or a dead CMOS battery can also cause this type of failure. So check these also.
This can also be caused by a damaged master boot record or primary boot partition. Run fixboot or fixmbr from the recovery console on XP or just run the Vista Boot Repair Console in Vista
Worm Viruses and Rootkits that damage the primary boot sector or the Master Boot Record can also cause the OS to mysteriously disappear. So if none of the above sound like they are for you, then you can try looking for one of these on the affected drive.
Hope this helps,
Posted on Oct 08, 2010
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Posted on Jan 02, 2017
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