Strange Shutdown problem

All of a sudden I can not restart my computer (No Beep) unless I reseat the ram or turn off the switch on the back of the computer. If I just click on turn off computer (WinXP) and try to turn it back on with the front button I get no beep. All lights work and the HD light stays steady on. I have not made any hardware changes.
Abit KT7A
AMD Duron 750
384 MB Ram
30 GB WD HD
Any help would be greatly appreciated.

 

restart xp

Can you press "F8" & select last known good boot?

 

Pwr supply issue

I have seen this before.

System boots normally - shuts down normally - the next time you want to boot - no response.

To get system to boot you must disconnect AC pwr cable then hold in pwr button for 5 seconds to clear all residual pwr.

Once AC cable is re-attached system boots normally.

Cause is usually that the pwr supply is not providing proper power to MBD to allow ACPI to boot the system. - ATX & P4 pwr supplies apply pwr to mbd at all times - mbd is what tells pws to come on fully.

(Beg. borrow or Steal) another pwr supply, try using it to see if issue remains, if it works with the replacement...

 

psu

This really does look like a power supply unit alrite.
Good call Profgab101 on powerdrain thing
pops139 sorry i didn't catch your first 4 words "All of a sudden "

 

Pops - Could be a few things, but sounds to me like you need to do some fine tuning with your bios settings. You have what is one of the finest motherboards made but they can be a little tricky to setup correctly. First few things that this behavior indicates is either memory speed or latency, AGP settings - various or memory clock setting CLK+PCI if 133 or CLK if 100. These can also be affected by variances in your PS voltage, but I'd do some bios tuning first. Your Via hardware manager is going to give you a good general read on voltage. You may also have an IRQ conflict which is quite common for this particular symptomatic behavior.

Go to this link and read, read, and read some more - you'll find the answer to your problem. Your primary focus should be bios settings. Check all the FAQ's too. Trust me.

http://www.viahardware.com/faq/kt7/kt7faq.htm

Profgab makes a good point - quickest check is swapping PS. However, I've seen these boards refuse to boot for a host of different reasons - usually bios related. First one I ever did (KT7) repeatedly took about 4 - 5 startup attempts after a shutdown before it would post. I struggled with this for hours before I got it right.

You should also regularly update your 4 in 1 drivers.

 

Hot tip!

I agree that getting that 4-in-1 driver properly installed and proper version can be critical for optimal system performance.

As to the BIOS - if it isn't working now, it can't hurt if you select the option to reset defaults.

 

Profgab 101,

Holding in reset or pwr off for more than 5 secs has always been the traditional remedy to dissipate any residual charge. Pulling the AC and then reconnect is a new treatment to correct this problem; at least I have never it before.

It seems to me that this is counter intuitive when one considers there remains an earth grd while plugged in. To remove earth grd somehow plays into your explanation!?