Windows 7 Cannot See Post or BIOS Screens

[DWP]

I have never experienced Startup or video problems prior to this week.
Now there is no video display during POST or the BIOS screens.
Once Windows7 starts, all video and sound is normal.
(Also I have stopped hearing system beeps during startup)


GTX 260 Black Edition video cards have only DVI connectivity.
Behavior is the same for either our Hanns-G HG281D monitor connected via DVI-HDMI cable or
our Asus VW246 monitor connected via DVI

Not being able to see the BIOS screens, I am at a lost as to how to troubleshoot, check the BIOS, or update the BIOS.

How do I troubleshoot this problem.

Windows7 Professional
Asus PT6 Deluxe V2 Motherboard
Two(2) GTX 260 Black Edition video cards
Hanns-G HG281D monitor connected via DVI-HDMI cable or
Asus VW246 monitor connected via DVI
Corsair HX 1000 power supply

 

[ChatGPT]

It sounds like you are experiencing a display issue specifically during the BIOS and POST stages, but once Windows 7 loads, the display works normal. Here are some steps you can take to troubleshoot this problem:

Possible Causes:​

1. BIOS Settings: The BIOS settings might be configured to use a display output that is not connected to your monitors.
2. Graphics Card Configuration: The display output of the GTX 260 Black Edition video cards may not be compatible with your monitors during the BIOS stage.
3. Monitor Connection: The connection between the monitors and the video cards may not be properly set up.
4. BIOS Version: An outdated BIOS version might be causing the issue.

   Troubleshooting Steps:​

5. Check BIOS Settings:
   • Try resetting the BIOS settings to default. This can sometimes resolve display issues.
   • Ensure that the primary display output in the BIOS is set correctly (usually PCI-E for your setup).
   []Graphics Card Configuration:
   • Check the compatibility of the GTX 260 Black Edition cards with your monitors during the BIOS stage.
   • Try connecting the monitors to different video outputs on the video cards to see if that resolves the issue.
   []Monitor Connection:
   • Make sure the DVI-HDMI cable or the DVI cable is securely connected to both the video card and the monitor.
   • Test with a different DVI cable or DVI-HDMI adapter to rule out cable/connection issues.
   []BIOS Update:
   • To update the BIOS, you typically need to access the BIOS settings during startup. Since you can't see the BIOS screen, this might be challenging.
   • Consider checking the motherboard manual for instructions on updating the BIOS blind (without being able to see the screen).
   []System Beeps:
   • If you have stopped hearing system beeps during startup, this could indicate a hardware issue. Ensure that the motherboard speaker is connected and functioning properly.
6. Single GPU Testing:
   • As a test, try using only one GTX 260 Black Edition card to see if the issue persists. This can help identify if the problem is related to the SLI configuration.

     Additional Considerations:​

     • If possible, try borrowing a different monitor to see if the issue is with the monitors themselves.
     • Ensure that all hardware components, including GPU, RAM, and CPU, are seated correctly.
     • Check for any recent updates or changes to the system that might have triggered this behavior.
     By following these steps, you can narrow down the possible causes of the issue and hopefully resolve the display problem during the BIOS and POST stages.