Inspiron 17R SE 7720/ After hard reboot, operationg system not found

Question

hi, I've had this computer for almost a year and I have to say i've been pretty happy with it till about 3 hours ago. This morning when i started my computer it loaded at the Dell sign but then turned black, the vent was blowing but no picture. I've had this one before and then a reboot fixed the probelm so i press the on/off button and reboot. Now the 'reboot' with problems screen comes on and check the registry etc but also starts repairing the C disk. Never saw that before and it takes a while then when it reaches 100% it starts... well again i get a black screen. so i reboot Now i get the dell icon without the loading circle, when i went into boot options and opened it with 'Legacy' the first and only line reads 'Operations system not found', i've done a system check by using f12 and there are no problems however when i go into f12 i can chose to boot by using CD,USB,network and second hardrive but there is no option for the FIRST hard drive where windows is installed... So what can i do????All help is appreciated

DELL-Saharsh K · Accepted Answer

Hi Freakkriek,

Apologies for a delayed response as I was out of office.

You will need to format the hard drive to perform clean installation of the Windows, so there will be data loss. I recommend you to backup the data before you perform clean installation. You may remove the hard drive from the system, and install it on a External Hard Drive Enclosure with Integrated USB Cable. Connect to another system and back up the data, or you may contact any local technician or computer store who may help you to backup the data.

You may go ahead and install the Windows on the SSD, however Dell has not tested it not does it promotes installing Windows on SSD. You may use the Recovery Media (if created when you got the system) or Windows re-installation discs to re-install the Windows. Please share if you have them or not. If not, then share the system's Service Tag and Owner's Name with me via private message (click my username and then click Send a Private Message). I'll review the details and share the further course of action with you.

DELL-Saharsh K · Accepted Answer

Hi Freakkriek, Glad to know that the issue is resolved. Feel free to reach out to us if you need any assistance in future, I'll be happy to assist you.

DELL-Saharsh K · Answer

Hi Freakkriek,

Try releasing the residual charge from the system. Here are the steps:

Disconnect any external peripherals (flash drives, printers, external hard drives) from the computer including the battery and AC Adapter.
Press and hold the power button for 20 seconds.
Reconnect the battery and AC Adapter. Try to restart the computer and check.

Also, run diagnostics on the system to confirm hardware functionality. Here are the steps:

Restart the system and immediately start tapping the 'F12' key to enter the 'Boot Menu'.
Use the 'Down Arrow' key to highlight the 'Diagnostics' option. Press the 'Enter' key.
The diagnostics will begin. Please note the exact error message/code, if any appears on the screen.
You may also refer to the video on the link http://dell.to/17DCL0R for more information.

Please boot to BIOS by tapping the F2 key on the startup and check if the hard drive is getting detected or not. Hope this helps.

Please reply if you have any questions.

Freakkriek · Answer

Thanks for both quick replies,

I executed all suggested fixes from the first post but still no change.The diagnostic hasn't given me an error message.

I only put it in Legacy mode since when started in UEFI (with safemode on or Off) leaves me with a dell logo without any response.

I rebooted and now i get the black screen with the dell logo and that is it...

any further suggestions?

thanks for the help

DELL-Saharsh K · Answer

Hi Freakkriek,

Please try the steps below :

Change the SATA operation in BIOS (tap F2 on start up),from Intel Smart Response to AHCI.
Save changes in BIOS.
Reboot the system
Go back into Bios (F2) and change SATA operation from AHCI to Intel Smart Response.
Save the changes
Reboot the system.
System should boot normally into Windows.

Hope this helps. Please reply with the results.

Freakkriek · Answer

Tried the steps above...Twice... No change yet...Please is there anything else I can do???

DELL-Saharsh K · Answer

Hi Freakkriek,

It appears that the Windows are corrupt and you will need to re-install it. However, you mat try restoring the system back to factory state if it allows you to do so. Please backup the data as this process leads to complete data loss. Here are the steps:

Shut down the computer
Power On the system
Power Off the system at Dell Logo with “rolling dots” at the bottom of the screen
Repeat the above steps 2-3 times
Click ‘Troubleshoot’
Click the Dell Backup and Recovery icon.

The system restarts and comes back up, click Next on the Dell Backup and Recovery Screen.
The system would be checked to see if the smart repair option can fix the issue, click Next once this is done.
You will be prompted to select the backup to be used, click the factory image option or select from one of the backups. Click Next.
You will be prompted to backup your files, if needed do so by selecting the option Yes, backup my personal files (Make sure to have an external backup hard drive handy.) or select No, Erase my files.
The system goes ahead and completes the restore of the operating system. Click Restart when prompted.
Follow the on-screen instructions to setup the system with windows.

Hope this helps. If the issue still continues, then you would require the Recovery Media (if created) or Windows Re-installation Discs to perform clean installation.

Please reply if you have any questions.

Freakkriek · Answer

Hope this helps. If the issue still continues, then you would require the Recovery Media (if created) or Windows Re-installation Discs to perform clean installation.

Please reply if you have any questions.

Well here is the thing, the "rolling dots" don't appear it's just the Dell Logo so it seems a Re-installation is required however
it is possible to perform a re-installation without losing all stored data???

I had one C-disk (used to operate windows), one D-disk (with all the data worth saving) and one ssd-disk...
And since i'll be re-installling it is it worth it to install windows now on the SSD disk???
Since i read somewhere a lot of people do that nowadays

In any case really surprised by the quick and well phrased help here
thanks everybody!!!!

Freakkriek · Answer

Thanks i did perform a clean installation and it works again. my problem is solved and this questions is answered,Thanks for your speedy replies and wonderfull support :)

SebastianVD · Answer

Dear,

I have the same problem with my dell inspiron 7720 17R.

At startup the message "operation system not found" is put on the top leff side of the screen.

All the tricks above do not work although the preinstallation of windows 7 should bo on my PC.

What can I do? Somewhere, I think I need a startup USB of CD for windows 7, but I never made one.

Can you please assist?

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