Member Avatar for android22

Hi!

I just built my costom build about a month ago and, like and idiot, uploaded windows XP to it. Now i just bought Windows 7 and was trying to do a USB boot with the software and do a costum configuration. But once i set the BIOS to boot from the USB port i lost all visuals to my monitor. The signal is completley gone. The Comp still runs and sounds fine, ny help will be greatly appreciated!

Android22

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Brief, practical checklist for a no-video condition after changing BIOS on an ASUS P8Z68-V LX (build details from ; already suggested the basic cable checks).

First, isolate display hardware so it is clear whether the board, GPU, or BIOS is the problem. Try the steps below in order; stop when the system shows the POST/BIOS screen.

  1. Minimal hardware POST
  • Power off, remove all drives and USB devices. Leave CPU, one known-good RAM stick, motherboard speaker (or use case speaker), PSU, and either the discrete GPU or nothing if you can use onboard video.
  • Power on and listen for POST beeps or watch any board debug LEDs. No beep/LED suggests power/CPU/RAM problem; a POST beep but no video points to the GPU/display path.
  1. Check onboard vs discrete video
  • If CPU has integrated graphics, remove the discrete GPU and connect the monitor to the motherboard video ports. If you get video, set BIOS Primary Display to IGFX or Auto, then reinsert the GPU if needed.
  • If the CPU lacks an iGPU, skip this and focus on the discrete card.
  1. GPU power and seating
  • Reseat the GPU, try a different PCIe slot if available, and confirm all PCIe power cables (6/8-pin) are firmly connected. A card without power can spin fans but output nothing.
  • If possible, test the GPU in another working PC or try a different known-good GPU in this board.
  1. Cables and monitor inputs
  • Try a different cable type (DVI/HDMI/VGA) and ensure the monitor input selection matches the active connector. Passive adapters can fail on some cards.
  1. BIOS/USB interaction
  • Boot with no USB installer attached to verify BIOS appears. If you see BIOS, recreate the Windows 7 USB using a different tool or check for UEFI/legacy compatibility before trying again.

Notes and cautions

  • Use anti-static precautions when touching components. If none of the above restores video, test with a different PSU or have the board/GPU bench-tested at a shop.

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Member Avatar for Rashakil Fol

Did you change your BIOS settings back?

Also, unplug your monitor cable and plug it back in, at both ends. Also, unplug your monitor power cable and plug it back in, at both ends (sorry, I know you know I'm assuming you're a bit retarded here, just do it). Unplug the USB device, too.

Can you confirm that other computers work with the monitor?

Member Avatar for android22

(this is his friend) okay did that. monitor was just tried with success on this laptop. Cleared CMOS and also set TPS just for S&G. still nothing.

System is on a ASUS P8z68-V LX

Thanks for your help.

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