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Pc powers on, but resets or shuts down before boot - dvd to blame?

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#1 megsmaw


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Posted 10 December 2009 - 06:05 AM

The other day my pc was working fine, it shut down normally. The next morning when I switched it on I got the usual POST messages, but before the OS could boot I got "Ntldr is missing". After resetting, the screen began to scramble and the pc would reset/shutdown after a few seconds. So I unpluged the power cord and left it for 10 mins. When I switched it back on I managed to get to the MS recovery console and chose the "use last good boot". This worked and I got into the desktop where I noticed that my dvd rom was missing - it was not in the device manager and there were no upper/lower filters in the reg. I ran extensive virus/malware etc. checks to no avail. I rebooted the system and noticed that the BIOS has the dvd listed as disabled. The pc worked fine that whole day. Then I tried switching it on yesterday and it's not booting again. Sometimes the POST info comes up, but mostly is just scrambled and resets/shutsdown after a few secs.
I've tried all the cables, cleaning out dust, the dvd has no disks in it and made sure everything was secure and not loose. Thanks in advance for any help as I am currently writing this using my Wii.
Specs: MB - ASRock K7S41GX
AMD Sempron
1 Gb RAM
Nvidia Geforce FX 5500
LG dvd rom
80Gb HDD

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#2 garmanma


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Posted 10 December 2009 - 03:48 PM

ntldr is missing

I managed to get to the MS recovery console

Method 2: Use the Recovery Console

1. Use the Windows 2000 Setup disks to restart the computer, or use the Windows 2000 CD-ROM to restart the computer.
2. At the Welcome to Setup screen, press R to repair the Windows 2000 installation.
3. Press C to repair the Windows 2000 installation by using the Recovery Console.
4. Type the number that corresponds to the Windows installation that you want to repair, and then press ENTER. For example, type 1, and then press ENTER. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
229716 (http://support.microsoft.com/kb/229716/ ) Description of the Windows Recovery Console
5. Type the Administrator password, and then press ENTER.
6. Type map, and then press ENTER. Note the drive letter that is assigned to the CD-ROM drive that contains the Windows 2000 CD-ROM.
7. Type the following commands, pressing ENTER after you type each one, where drive is the drive letter that you typed in step 4 of "Method 2: Use the Recovery Console," of this article:
copy drive:\i386\ntldr c:\

copy drive:\i386\ntdetect.com c:\
If you are prompted to overwrite the file, type y, and then press ENTER.

NOTE: In these commands, there is a space between the ntldr and c:\, and between ntdetect.com and c:\.
8. Type the following command, and then press ENTER:
type c:\Boot.ini
A list similar to the following list appears:

Continued here: http://support.microsoft.com/kb/318728
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