Member Avatar for maramizo

Computer starts, ONE POST beep, monitor doesn't start, keyboard lights flash twice (Once at POST and other time at windows load*). Can anyone help me fix this problem? * = Is a guess, unsure if that is the reason, even though after second flash, I can (de)activate all locks. (Num/Scroll/Caps)

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  • Latest Post Latest Post by RAELIE

Dani AI

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A few practical follow-ups and checks that complement what and suggested, plus a short answer to ’s PSU question and a quick note for .

  • Isolate the display first. Try the monitor OSD/menu buttons with the PC cable unplugged to confirm the panel and electronics respond. If menus are visible but no PC image, the problem is the video path. If nothing appears at all, suspect the monitor power/backlight or its internal board. A bright flashlight held close can reveal a faint image if the backlight has failed.
  • Swap cables and ports. Test a different video cable and a different output on the GPU (or a different input on the monitor). Adapters and single-pin failures are common and quick to prove or disprove.
  • Check the card and power. Reseat the GPU, confirm any 6/8-pin PCIe power leads are connected, and try the card in another machine (or a known-good card in this one) to split the fault between card and tower.
  • Minimal-boot test. Remove extra drives, peripherals and extra RAM sticks, boot with one stick and the GPU (or onboard output) only. Use the motherboard manual to interpret any beep codes; those codes are BIOS-specific and the manual is definitive.
  • If you get BIOS but no OS image, boot safe mode or use a live USB to rule out driver/OS issues.

PSU voltage: prefer a modern unit that accepts 100–240 VAC (auto-switching). If a PSU has a manual 115/230 selector, set it to match local mains; the tiny numeric difference between 220 and 230 V is not material for correctly rated gear. If unsure, buy a universal-input PSU or check the label/manual before powering up.

Laptop note for : try an external monitor to see whether the laptop is still outputting video. If an external works but the built-in does not, suspect inverter/backlight or display cable failure; otherwise look at drivers or GPU faults.

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Member Avatar for rubberman

Either the video card or monitor are fubar, or your cable is defective. If the monitor can give you access to the on-screen menus and such, then the monitor itself is ok, though there is a small possibility that its input interface is bad. However, it is much more likely in such a case that the video adaptor or cable are bad. Does your computer have built-in graphics, or does it have a discrete video card plugged into the I/O bus?

Member Avatar for maramizo

It is not built in.

Member Avatar for JorgeM

If you know what type of motherboard you have, you can easily look up the beep codes. Otherwise, you'll need to start removing components until you find the one that is preventing you from getting through POST.

Member Avatar for maramizo

Please read topics more carefully. In any motherboard one beep means it works properly.

Member Avatar for maramizo

It was the VGA.
Another question: Should I get a 220V PSU or 230V?

Member Avatar for RAELIE

MY LATOP STARTS/ON WHEN I SWICTCH ON POWER...WINDOW LOADED AND IT GOES BLANK

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