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Integrated Graphics Card iGPU suddenly not being detetected

Posted on 2016-10-02
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Last Modified: 2016-10-02
I have been using two monitors and a projector on my computer for some time (over a year) and for some reason after a Windows update and restart the integrated graphics card is now not being detected.  

The integrated graphics card (Intel) works if I take out the discrete card (NVidia GT620).  As soon as I put the NVidia card back in then the integrated graphics card is not detected.

If I go to the device manager then the Integrated card does not show however if I select the 'show hidden devices' then the intel device is shown (faint) but the properties tell me that it is not connected.

Device Manager
I have two monitors connected to the NVidia (VGA and DVI-D) and one projector connected to the Integrated VGA.

Things that I have tried:
1. Uninstalled Windows Update
2. Reactivated iGPU ENABLED in BIOS and set iGPU as Primary source
3. Uninstalled and reinstalled drivers for integrated and NVidia
4. installed Lucid logix
5. Downloaded latest drivers for discrete and integrated
6. Repaired Windows
7. reinstalled Asus GPU Tweak and VGA drivers from Asus installation CD
8. reinstalled chipset and intel graphics drivers

System Specs:
Windows 10 Home 64-bit
Intel Core i5-3470 @ 3.2GHz
8gb RAM
ASUS Motherboard P8Z77-VLX
NVIDIA GT620

Help!
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Question by:Abdul Muhaimin
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6 Comments
 
LVL 88

Expert Comment

by:rindi
ID: 41825272
Check if there is a BIOS upgrade for your PC.
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Author Comment

by:Abdul Muhaimin
ID: 41825281
Hi Rindi - thanks for getting back.

I did think about updating the BIOS however

- Why would updating the BIOS make a difference if it has been working?
- I have read many posts where others have updated their BIOS and their has been no change
- Didn't want to take the risk of updating the BIOS and then not being able to start up again

I will give it a go - any other suggestions.

Thank you for your help
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LVL 88

Expert Comment

by:rindi
ID: 41825285
There could be an incompatibility with the old BIOS and your upgraded OS, or a bug in the BIOS.

Another possibility is that your PSU isn't powerful enough to drive both GPU's. PSU's deteriorate over time, that means that they may no longer be able to provide the wattage they used to. You'd notice that if the original unit was already close to the minimal requirements for your hardware.
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Author Comment

by:Abdul Muhaimin
ID: 41825292
I'll give the BIOS and update and see if it fixes it.

The power supply is RS-500-PCAP-I3 500W

Any ideas on how to check the PSU power output and to check if it has deteriorated?
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Accepted Solution

by:
rindi earned 2000 total points
ID: 41825303
You can't really check that without measurement equipment. According to the requirements of the NVidia card, it needs to be at least 300Watt. but that doesn't take into account for everything else in the PC (Add-on cards, HD's, Optical drives etc).
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Author Closing Comment

by:Abdul Muhaimin
ID: 41825433
Well, I took the plunge and updated the BIOS and problem is now resolved.

Thank you for your time Rindi!
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