POST hangs during Boot

  dregn 07:39 11 Sep 2005

My CPU is an Athlon 64 3500+ and the BIOS is Phoenix Award . I am running Win XP Pro on a recently built system.
On start there is one beep ( as normal )and after the memory check the POST hangs and will not proceed. I am unable to enter the BIOS.
I have 1024 MB RAM fitted.
I have tried 'cold' and 'warm' boots to no avail.
I have attempted to boot from an Win XP boot floppy without success.
No recent hardware changes have been made.
I am tempted to reset the CMOS battery but would appreciate any ideas and advice before I do so.
An hour or so ago I was able to access the BIOS but now the situation is as described above.

  Diodorus Siculus 07:45 11 Sep 2005

Is your RAM in one or more modules? If you can, remove as many of them as you can and see what happens. If possible try a different RAM module also.

Can you remove all cards except the graphics card see what happens?

What sort of drives are connected? Maybe you can remove one or more of them leaving only the master hdd.

Sounds like something has failed.

That much will at least begin to determine where things might be going wrong.

  dregn 11:07 11 Sep 2005

Diodorus Siculus

Thank you for your thoughts - most helpful.

RAM is in two x 512 sticks and there is only a Wireless adaptor card fitted apart from the graphics card.

I was reluctant to start on the innards but I have not much alternative !
I built the system myself so I know my way around it.

I shall be away for a couple of days so it may be the middle of the week before I can get to grips with the problem.

Thank you so much once again and I will return with a progress report.

Best wishes.

  DieSse 13:28 11 Sep 2005

Faulty keyboards and faulty hard drives can cause hangs at that point.

  dregn 18:07 11 Sep 2005

Thanks everyone. I removed one stick of memory and this was detected on the next ( partial) boot.
I removed the power to other drives and left the boot drive in situ.
No improvement there. Then I powered down and rejumpered the CMOS .
Started up again and all appeared to be OK.
I reset the drives to previous config, refitted the second stick of ( Corsair) memory and now the system is going smoothly ( fingers crossed )
Previously I had been troubled by frequent freezes, long shutdowns and problematic booting.

So, clearing the CMOS seems to have effected a cure - but I ask myself 'Why ?'

Is this a portent of impending component failure or just an isolated glitch?

If anyone has encountered similar I should be interested to hear.

Meanwhile thank you kind souls again for your helpful suggestions.

  User-312386 18:13 11 Sep 2005

could be the battery failing in CMOS

  dregn 03:04 12 Sep 2005


Thanks for that. It had occurred to me that was a possibility. I think I will renew the battery to be on the safe side.
Does anyone know the correct battery I should get ?

  Diodorus Siculus 07:27 12 Sep 2005

Most modern-day mother board batteries are the same; if in doubt, take the one you have with you and get one that matches.

  dregn 20:42 13 Sep 2005

Diodorus Siculus

Many thanks for that - I will do that.

Best wishes and thanks to all,


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