Member Avatar for simon

I've got a PC, with a new Biostar M7NCD motherboard,

It was working fine until today when it rebooted itself on me and then every time I go to turn it on it just sits and beeps at me!

It Beeps for 1sec, then nothing for 4sec, then beeps for another sec and so on.
I'm not sure what this means, everthing powers on ok, but there is no display signal either.

any ideas?

Thanks Si

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Building on and and noting 's "memory management" BSOD followed by the repeating 1s-on/4s-off beep, here is a focused, step-by-step approach to isolate the problem without repeating basic reseat advice.

Start with a true minimal boot: unplug all drives and remove every nonessential card so only the CPU (with cooler), one DIMM, and the video output remain. Use the motherboard's recommended DIMM slot. If the board posts, add one item back at a time until it fails — that narrows the culprit fast. If it does not post, run a memory tester (MemTest86 or Windows Memory Diagnostic) from removable media; several passes will usually reveal bad cells. Test each DIMM one at a time in each slot to distinguish a bad stick from a bad slot or memory controller.

Clear CMOS properly: power down, unplug the PSU, and either use the motherboard clear jumper or remove the coin cell for a minute before reseating it. This resets timings and voltage settings that can produce both POST beeps and intermittent blue screens. While the system is open, do a careful visual check for bulging or leaking capacitors, scorch marks, or loose CPU socket pins. Smell for burnt components; a failing PSU can let fans spin while failing to provide correct rails.

If diagnostics show memory errors or a failed slot, test with a known-good DIMM or swap in a known-good PSU to rule out supply-rail issues. Identify the BIOS vendor (label on the BIOS chip or in the manual) and consult the Biostar manual for exact beep-code meanings. If the board still refuses to POST after these steps, gather error symptoms and contact Biostar/support or consider RMA — repeated POST beeps plus prior BSOD strongly point to hardware failure rather than software.

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Member Avatar for Catweazle

Check that the display card or the RAM modules have not worked a bit loose in their slots. Those are the most likely options.

Member Avatar for simon

rite tryed that, took the ram out and gave it a blew,

now just before it boots in to the desktop after the WINXP logo, it say iv got a memory management problem on big blue screen???

thanks Si

Member Avatar for Catweazle

Oh dear!

Simon, you DID turn off your PC and disconnect the power cord before touching anything inside it didn't you? There is power in the motherboard even after you've told Windows to "Shut down" unless you do that!


You may have a damaged RAM module. Try a different module in the PC to see if that makes a difference.

Member Avatar for caperjack

Yeah ,you should unplug and then hold the start button in for about 15 seconds or more to drain the powersupply also!

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