HELP!! with p4c800-e deluxe

[Zander]

Hi all,

I have a system with a p4c800-e deluxe motherboard. I needed the ram for a
friends computer so I removed it. I waited a few days, then got the ram
back. I re-installed the ram and the system will not boot at all, I don't
even hear any hard drive activity, no beep codes no video signal nothing,
it just powers up and sits there, also the front panel power switch wont
shut it off only the main switch on the back of the case.

Thanks,

Zander

 

[formerprof]

Are the fans running? If not, check that you haven't dislodged the power
switch connector from the proper motherboard pins. If that's not the problem
remove and reseat the memory vy carefully and pray . . .

Good luck! HTH


formperprof
(e-mail address removed)

 

[Tim]

Do you get any beeps on startup? If so what sequence are they?
Have you tried the amplified speaker in the Lime Green socket trick?

- Tim

 

[Paul]

Do you get any beeps on startup? If so what sequence are they?
Have you tried the amplified speaker in the Lime Green socket trick?

- Tim

Was the green LED on the motherboard off when you pulled the
RAM originally ? The PSU switch on the back of the computer should
be in the OFF position before adding or removing _any_ hardware. And
to guarantee that there is no stray voltage left, I recommend
unplugging the computer, as a way of reminding you of the importance
of powering down before changing hardware. It is easier to remember
to pull the power cord, than remember the switch on the back.

I hope you haven't damaged the chipset, if the power happened to
be left on.

The most likely source of your problem is a power supply failure.
You could try powering the board from another PSU, to see if that
makes a difference.

If this happened to my P4C800-E, the first thing I would do is
pull the motherboard from the case, and try to get it running
on a tabletop, with a minimum of components plugged in. The
motherboard can drive the amplified speaker via the lime green
colored Lineout jack on the back of the computer. The minimum
system is motherboard, power switch (or screwdriver tip to short
the two power switch pins momentarily), PSU, and amplified speaker.
The Voice POST system should talk to you. (If the computer starts,
holding the screwdriver tip on the power pins for >4 seconds should
cause it to power off again.)

Then, add components back one at a time, until something unexpected
happens. That will help identify what has failed.

If the minimum system doesn't respond, check to see that the green
motherboard LED lights when the switch on the PSU is set to ON.
This indicates that +5VSB is flowing. If you get no response via
the power switch, it could be the AGP_warn circuit stopping the
motherboard, in which case removing the AGP card would stop
AGP_warn from interfering.

So, go back to basics, building up the computer a bit at a time,
and make sure the Voice POST messages make sense with respect to
what components are plugged in. You can plug them in, in this
order: CPU, memory, video card, monitor, keyboard, mouse, (inspect
BIOS), floppy drive, (run memtest86 from memtest.org), hard drive
(only boot to Windows if the memory passed memtest86 error free).

HTH,
Paul

 

[Zander]

Was the green LED on the motherboard off when you pulled the

RAM originally ? The PSU switch on the back of the computer should
be in the OFF position before adding or removing _any_ hardware. And
to guarantee that there is no stray voltage left, I recommend
unplugging the computer, as a way of reminding you of the importance
of powering down before changing hardware. It is easier to remember
to pull the power cord, than remember the switch on the back.

I hope you haven't damaged the chipset, if the power happened to
be left on.

The most likely source of your problem is a power supply failure.
You could try powering the board from another PSU, to see if that
makes a difference.

If this happened to my P4C800-E, the first thing I would do is
pull the motherboard from the case, and try to get it running
on a tabletop, with a minimum of components plugged in. The
motherboard can drive the amplified speaker via the lime green
colored Lineout jack on the back of the computer. The minimum
system is motherboard, power switch (or screwdriver tip to short
the two power switch pins momentarily), PSU, and amplified speaker.
The Voice POST system should talk to you. (If the computer starts,
holding the screwdriver tip on the power pins for >4 seconds should
cause it to power off again.)

Then, add components back one at a time, until something unexpected
happens. That will help identify what has failed.

If the minimum system doesn't respond, check to see that the green
motherboard LED lights when the switch on the PSU is set to ON.
This indicates that +5VSB is flowing. If you get no response via
the power switch, it could be the AGP_warn circuit stopping the
motherboard, in which case removing the AGP card would stop
AGP_warn from interfering.

So, go back to basics, building up the computer a bit at a time,
and make sure the Voice POST messages make sense with respect to
what components are plugged in. You can plug them in, in this
order: CPU, memory, video card, monitor, keyboard, mouse, (inspect
BIOS), floppy drive, (run memtest86 from memtest.org), hard drive
(only boot to Windows if the memory passed memtest86 error free).

HTH,
Paul

Thanks Paul,

Yes the green led was on.... oops! But as it turned out there is a small 2
wire connector from the ps to the mb that is right beside the ram that had
gotten pulled out. Once I put it back it was right as rain. I will
remember about pulling the plug in the future. I actually normally leave
it plugged in as a theoretical protection against static, ie still
connected to system ground?

Thanks again,

Zander

 

[Paul]

Thanks Paul,

Yes the green led was on.... oops! But as it turned out there is a small 2
wire connector from the ps to the mb that is right beside the ram that had
gotten pulled out. Once I put it back it was right as rain. I will
remember about pulling the plug in the future. I actually normally leave
it plugged in as a theoretical protection against static, ie still
connected to system ground?

Thanks again,

Zander

You mean the 2x2 ATX 12V power for the processor? (Upper left, near
DIMM_A1). That provides power for the processor core, and when the
cable is disconnected, the computer cannot POST.

Paul