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Missing Operating System On Bootup, Or Restart

Last response: in Windows 7
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November 8, 2013 10:27:17 PM

About three months ago my computer crashed and I had to have it rewashed and was unable to recover anything it all. It started by getting eight missing operating system on restarts or boot up, well for the last week now every time I restart my computer I get my lenovo logo and then missing operating system on a black screen. It's happened three times now and so far what I've done is just tried to restart it powered off power and on and it will keep displaying the same thing. I have to physically remove all power sources from my computer for 10 to 15 minutes plated back in and if I'm lucky it boots up fine. What can I check, as is common and how can I fix it. If you could just give me a list of things to check and go over. And if you wanna know and answer to a question like what programs I have installed just ask me and I will include a screen shot maybe offer a one in right now it, able to take one. By the way that something else usually I can hit control prey to take a screen shot that has not been working either but this boot up missing operating system is a much more important. This is my production PC and my main PC if I lose it I lose my business.
a b $ Windows 7
November 8, 2013 10:31:53 PM

try to test your hdd from that laptop in another system drive could be out .
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a b $ Windows 7
November 8, 2013 11:54:58 PM

Be careful with that though, the operating system on the drive may reconfigure itself in order to load the correct drivers for the system and I did have an occasion where doing that caused exactly the same problem; missing operating system.

However, your problem does suggest a failing drive to me.

But sixty quid for a hard drive, maybe, and a copy of the image on your failing drive will sort that out. You do have a backed up image, don't you?

You sorted your screen-shot problem out then?
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November 14, 2013 8:33:24 AM

Sorry to hear this, but it just happened to me, too, on my less-than-60-day old Lenovo ThinkCentre M82 with Windows 7 Pro and a 500 GB drive. I repeat: this system is brand-new! It appears to be the curse of death on the drive and I am finding a lot of reports that are Lenovo-based on this issue. When I called the Lenovo Support department, it seemed to be a common problem and they offered to ship me a "blank drive" even though I paid extra for 3 years ONSITE support, Parts and Labor, so I refused that offer and am asking for a full return and refund.

Not sure what caused this problem. I have a firewall and Norton I.S. factory installed and only use this desktop for PDF files for real estate transactions. Luckily I did get it to boot to Windows 7 after several tries and backed up my key files to Dropbox.com.

How did you get your problem resolved? What steps did you take? What model is your Lenovo PC? Is it under warranty? Please let me know. Very distraught about this problem. Have had Windows PCs since the mid-80s and never had this happen, especially on a new PC. I am thinking Lenovo is putting out cheap Chinese-made junk and not standing behind it, but will know later today if that is the case.
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a b $ Windows 7
November 15, 2013 3:16:27 PM

I've just worked it out.

It is your PSU that is to blame.
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a b $ Windows 7
November 15, 2013 4:22:55 PM

himnextdoor said:
I've just worked it out.

It is your PSU that is to blame.

And you know this because....?

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November 15, 2013 4:51:22 PM

You should run a chkdsk /r on the drive to make sure it is not failing. Basically, at the command prompt in Windows, type the following "chkdsk /f C:" (without the speech marks) If it is fine, make sure everything is plugged in correctly inside the PC, and consider switching cables around to isolate if the problem is a faulty cable. Also, make sure in your Bios that your PC is trying to boot from the correct drive and not a cd/dvd.
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Best solution

a b $ Windows 7
November 16, 2013 8:15:02 AM

AxlMyk said:

And you know this because....?


... you are hugely talented and I am very grateful for your input. :pfff: 

When you press the power button on your computer, a signal is sent to the motherboard which in turn sends a signal to the PSU and the system powers up.

When you shut the system down, you send a signal to the motherboard which in turn sends a signal to the PSU causing it to interrupt the power to the system which then shuts down.

When the PSU shuts down, all the supply voltages to the motherboard are cut off.

Or they should be.

The only reason for your 'start-up method' can be useful is if there is a voltage being applied to the board after the PSU has shut down. Unplugging the power cord allows such voltages to drain away.

I think that your PSU is continuing to supply a low voltage to the board which might mean that the board retains some functionality after shut down; your PSU is not responding to the shut down signal correctly.

When you restart, part of the board is already 'pre-initialized' and this causes conflicts during the initialization process.

When you disconnect the power cord, the 'rogue' voltage drains away and then, when you reconnect and press the power button, the various parts of the system are initialized together.

Try this:

Unplug the power for fifteen minutes then connect it again and leave it for fifteen minutes or so before you try to restart.

Does the machine start?
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March 3, 2014 6:29:05 AM

himnextdoor said:
AxlMyk said:

And you know this because....?


... you are hugely talented and I am very grateful for your input. :pfff: 

When you press the power button on your computer, a signal is sent to the motherboard which in turn sends a signal to the PSU and the system powers up.

When you shut the system down, you send a signal to the motherboard which in turn sends a signal to the PSU causing it to interrupt the power to the system which then shuts down.

When the PSU shuts down, all the supply voltages to the motherboard are cut off.

Or they should be.

The only reason for your 'start-up method' can be useful is if there is a voltage being applied to the board after the PSU has shut down. Unplugging the power cord allows such voltages to drain away.

I think that your PSU is continuing to supply a low voltage to the board which might mean that the board retains some functionality after shut down; your PSU is not responding to the shut down signal correctly.

When you restart, part of the board is already 'pre-initialized' and this causes conflicts during the initialization process.

When you disconnect the power cord, the 'rogue' voltage drains away and then, when you reconnect and press the power button, the various parts of the system are initialized together.

Try this:

Unplug the power for fifteen minutes then connect it again and leave it for fifteen minutes or so before you try to restart.

Does the machine start?


I have the same issue. Are you saying I need to replace the PSU or possibly thinking it might be a BIOS or HDD issue causing the PSU to do this?

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May 14, 2014 1:55:48 PM

I got the "Missing Operating System" message then I realised I had a drive plugged into the USB port and the PC was trying to tell me that there was no operating system on that drive. Pulled the flash drive and restarted with no problems.
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