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Turn on a working computer with its keyboard plugged in and test if the keyboard is working properly.
If it is, shut down that computer, unplug the keyboard and plug it into the system that is suffering from the missing "NTOSKRNL.EXE" file.
Turn on the system to see if the replaced keyboard resolves the problem.
Press the "F8" key right after the system initializes the boot sequence and before the Windows logo shows up to bring up a menu of boot options.
Choose the "Last Known Good Configuration" option with the arrow keys and press the "Enter" key.
Insert your Microsoft Windows installation disc.
Restart the computer and press the "R" key on your keyboard once you reach the "Microsoft Setup" menu.
Choose the operating system that you wish to repair, type in your admin password when prompted and press the "Enter" key.
Type "bootcfg /rebuild" and press the "Enter" key to rebuild the Windows "boot.ini" file, which may also resolve the issue.
Type "chkdsk /r" and press the "Enter" key to scan the entire hard disk for errors.
Type "exit" and press the "Enter" key to exit the "Recovery Console."
Restart your computer and see if Windows boots properly.
The monitor is going into power-save mode because it's not receiving a video signal from your computer. Are you turning on the computer at the monitor or on the tower? If you're turning the tower on are you hearing any noise (i.e. fans running, beeps, drives spinning, etc.)? Does the power light on the tower come on and stay on? If not you may have a bad power supply or other hardware issue.
If your monitor is going in Power save mode it can be cause by following reasons.
>Check the data cable going from monitor to your Dell Dimension 4600 Tower is connected properly.The connector will be blue or white in colour.
>If the Dell Dimension 4600 Tower is powering on.
If still in power save mode then try to shutdown Tower and monitor,disconnect power cable from tower and monitor.Hold the power button on tower for 15 seconds.Then again try to connect monitor and check,if still nogo,and if tower has no lights then issue with motherboard or video card or power supply.If possible try connect spare known good monitor.
i) usually an computer enter's into power saving mode if computer monitor is not receiving any singals from the computer tower, so it has nothing do withur computer monitor(computer monitor is working fine), there is some problem withur computer tower.
ii) now try removing all the physical connections going to computer tower(back side), wall socket and replace them ....., (to avoid loose connections)
now see whether ur computer is turning on and working properly so that your computer monitor receive singals ....
First you need to make sure that there are no other removable devices plug on the system, like usb, external hard drives, then if that will work try to go to the bios, press f2 when you see the dell logo, and go to the system setup, go to the boot device configuration and make sure that removable device is not the first boot device, if it is the first one choose hard disk and then second boot device ad cd rom/dvd rom and then disable the 3rd boot and the fourth boot device. Make sure to save the changes. And restart the system again. Once the computer is back and running try to go to support.dell.com and check the bios, download if there is a bios update for the system.
try to start the computer and right after that press the delete key several times as it try's see if u can get into the system bios if so change everything to a default level make sure you pres the f10 to save all info and try to reboot if this doesnot work please let me know good luck
Firstly the keyboard does blink, but do you hear 2 beeps one then another a few seconds later, if not memory or graphics fault.
Are you able to start in safe mode(press F8 when pc is booting up)when menu comes up highlight 'Start windows with last known good configuration' then press enter and it should re boot.
The graphics card(if it's not onboard)may need to be removed and re seated, also the memory.
Also check hard disk drive ide and power cable.