> My system:
>
> Power Supply: Okia 420ATX
> Mainboard     : ASUS P4S8X-X
> CPU              : Pentium 4 2.66 GHz/533FSB (SL6EH)
> Memory         : Samsung 2x512MB PC3200
> Video:            : Chaintech GForce FX 5200 (nVidia) 8X AGP
> Drives            : Maxtor 80 GB ata 133/udma
> OS                 : Windows 2000 Pro
>
> Problem         : Failure to POST
>
> History          : P4 1.7GHz/400fsb (SL5TK) failed after a two months.
> Always showed a +3.3v Bus undervolt (+2.9v to +3.2v) and associated BIOS
> Beep Code (incessant Hee-Haw) when CPU was taxed by intensive applications
> or games.  I replaced the P4 with a 2.66 GHz/533FSSB (SL6EH) and received
> the same BIOS Beep Code (+3.3v Bus undervolt).  Nonetheless, the system
> worked well for a few hours and provided adequate and expected benchmarks
> via SiSoft Sandra 2005, PC Wizard 2004, CheckIt (NSW 2005) and Performance
> Test (NSW 2004).  Then the system froze admist nominal activity (chatting,
> email & surfing) it froze ignoring keyboard and forcing a manual RESET.
> It
> POSTed and BIOS screen warned me to check settings; I went to Power
> settings
> and discovered the 3.3volt supply was showing up red at 2.9v.  I continued
> to boot and system ran well for about another 7 hours requiring a manual
> RESET.
>
> There was no POST.  Board's SB_PWR LED was green (ON), fans worked, LED
> for
> IDE activity stayed on (went off after obligatory self-diagnostics (35sec)
> of the Maxtor primary drive.  The Keyboard NumLock light and Scroll Lock
> LEDs flash momentarily then remain off.  There is no video.  Recycling the
> RESET switch repeats everything except the Keyboard LEDs no longer flash
> and
> simply remain off.  Only recycling the main ATX power switch allows the
> Keyboard LEDs to flash.
>
> The Power Supply is about a year old and I am using it now with another
> mainboard to get online. The ASUS P4S8X-X mainboard is less than 90 days
> old.  I am crestfallen at ASUS lack of support since I deliberately bought
> this board with my own cash and of my own considered free will and
> discretion while under absolutely no duress.
>
> Before I replace the mainboard and/or power supply, I would appreciate
> some
> insights, advice or better yet: solutions.
>
> Thanks,
> Conrad
>
>
>