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No signal on monitor after startup

I have been dealing with this issue for a while. My computer will start up fine but the monitor will return no signal UNLESS I turn the monitor on and wait almost exactly 2.5 seconds before starting my computer. This usually takes several attempts.

I have replaced the CMOS battery, replaced the power supply, tried a different monitor with a different cable(same result), removed the graphics card and plugged it into the motherboard alone, moved the ram to a different slot configuration.

I am at a loss now and have no idea where to go from here.

Specs:

Asus P8Z77-V PRO

Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz

16gb ram

760w Seasonic x series

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Probably motherboard issue so reflash the BIOS. They occasionally can become slightly corrupted.

https://www.asus.com/supportonly/P8Z77-V...

Let us know how it goes.

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I made sure everything was up to date but did not think about the bios. Thank you very much, I am kicking myself for spending so long and so much money on psu's and other fixes.

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@SmogHouseTradingCo

Some times the obvious is the hardest or the last thing we think of. We've all been there.

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