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Re: good old-fashioned hardware problem

On 9/19/2010 10:02 AM, Robert Socrates wrote:
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One thing I've not heard anyone mention would be to remove the
motherboard from the case and try powering it on while it is sitting on
a non-conductive surface.  Reason for the suggestion is a possibility
that a mounting point has shifted just enough to cause a short somewhere
on the board.

As for no beep, does your motherboard include a wired connection to a
speaker mounted in the chassis which might be loose at either end?
With no memory or other circuit cards installed the beast should beep
like crazy when powered on.

Another thought would be to try defaulting the BIOS to factory default
by using the reset pin or removing the power cord for 10 minutes as well
as the motherboard battery.  This might reset something that is making
the system think the internal video system has been disabled in the BIOS.

Might try an external video card if you have one lying around and see if
that functions in case the problem is a defective internal video system
and not just one that is turned off.

Last thing I can think of is while the motherboard is out of the box
would be to plug in just a CD drive and memory and not the hard drive
and see if a Live Linux CD will boot up, but the lack of motherboard
BIOS not showing up briefly on the monitor makes me think that this will
fail as well.

Re: good old-fashioned hardware problem

If it is an ATX style motherboard, there should be an LED that comes on
when you power up on the motherboard.  In fact, there should be an LED
that stays lit when you power off.  For ATX, and with the power cord
still connected to the PSU, the PSU supplies a 5V standby line to the
motherboard to power its power-on logic (ATX uses logic on the mobo for
power on, not a direct wire from Power switch to PSU as was used in the
old AT-style mobos).  Well, for an ATX mobo there should be LEDs.  In
another subthread, the model mobo you mentioned and the .pdf doc that
someone gave you a link doesn't show any mobo LEDs (but that doesn't
mean there are no LEDs, just that they don't show them in their
illustrations of the motherboard).  

With the power turned off AND the power cord yanked out of the PSU, did
you check the 20-pin PSU connector on the mobo (by removing it and
reseating it)?  You said the CPU fan was spinning so it is getting power
but I don't know if it connects to a PSU connector, like a 4-pin Molex,
which means it always spins at full speed or if the fan connects to a
"CPU fan" 3-pin header on the mobo.

On that mobo is an 8-pin header (JFP1).  Are all the wires connected to
it?  Two of the pins are for Pwr_LED.  Do you see the Power LED in the
case light up when you apply power?  They label 2 pins as "PS-ON" which
doesn't make sense.  The PS-ON line (green wire, pin 14) is in the
20-pin connector from the PSU.  Even their manual says the JPW1
connector (20-pin PSU connector) has PS_ON as pin 14.  Is there or were
there any wires (in a 2-pin connector) that went to JFP1's PS-ON pins?

Can you get a video card from another host from a user that is willing
to sacrifice it in case you statically or physically shock that one,
too?  Otherwise, you can get some basic video cards for cheap just to
check if the video card is the problem and not something on the

Newegg: Cheap AGP video cards starting at $32

You didn't mention what slot you use for a video card; however, the
manual that someone gave a link to a .pdf file says it has an AGP slot.
When fully inserted, the locking tang at the back end of the slot should
flip up and lock the video card into place.  If you can't flip up the
tang to lock it then the card isn't fully seated.

A test video card would be cheaper than getting a whole new motherboard
and risk damage to the CPU, memory, and other devices with a mobo
replacement.  Ask around and you might find someone that has an old
usable video card sitting in storage in a drawer.  There might be some
electonics parts stores in your area that have old clunker PCs that'll
let you grab a video card out of them for a few dollars.  Or check
Craigslist for some cheapies you can use for a test video card.

Re: good old-fashioned hardware problem

Robert Socrates schreef:

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When you start it, is there a beep after some time? Normally that shoul=
show the result of the self test. Did it beep when being startet before=
accident? Or did you switch off the pc speaker in the bios?

That the hd is silent could be sign of fatal damage, normally it should=
start spinning with power on. Do you have another computer (maybe a fre=
to insert the hd there and test it?

Are any lamps on on the mainboard etc. when power is on?

Groetjes uit Arft,


D. Weber
Arft, Germany (50=C2=B023'N  7=C2=B05'E)
If possible, no html mails please

Re: good old-fashioned hardware problem

On Sat, 18 Sep 2010 23:13:00 +0200, Dirk Weber wrote:

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okay the hd is starting, i checked that. there is no beep though. I
removed the ram and started again an there still was none.
the mainboard itself has no lamps. I think the mainboard might be

Re: good old-fashioned hardware problem

Robert Socrates wrote:
Quoted text here. Click to load it

When something is dropped, I look for any pieces that have fallen off,
including any still inside the case, and I look at and around the
heavy parts, like the heatsinks for the CPU and in the power supply
and the transformers and coils in the power supply.   Transformers and
coils sometimes break their solder connections (not that hard to
resolder), and I've received two PSUs with cracked solder under their
transformers.  Also PSU circuit boards tend to be made of worse
material than those for motherboards  and computer cards and crack
more easily.  Don't open a PSU unless its AC power cord is unplugged,
and if the PSU is damaged it's possible to receive a serious high
voltage shock even long after the AC has been disconnected.

I'd disconnect everything from the PSU and motherboard not needed to
verify basic operation of the computer -- disk drives, cards (except a
slow one for video), all but one memory module, and try booting again,
possibly with a different PSU.  If that doesn't help, inspect both
sides of the mobo under strong light with a magnifying glass, to find
cracked solder joints (CPU, PCI, PCI-E, AGP sockets, all connectors at
the back) and dislodged or missing parts.

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