Re: HDD no longer detected on P4PE

aaron.withrow@xxxxxxxxx wrote:
Hello all, this is my first time posting. I'm having a problem with
one of my hard drives not being recognized, hoping someone here could
help.

I am using an Asus P4PE mainboard. I've had this for years and it's
been working like a champ. I opened her up to add some additional
memory and when I booted back up one of my hard drives is no longer
detected.

I have two hdds on the primary ide bus. One hdd and one dvd-rom drive
on the secondary ide bus. Everything was working fine prior to the
memory install, but now I can no longer see the hdd on the secondary
bus. It is (and has been) set to cable select, and is currently in
the slave position on the cable. I've tried wiggling the cable,
replacing the cable, swapping the position (master/slave), swapping
the power connection, etc. Nothing seems to work. Any help here
would be appreciated. I'm stumped at this point and don't know what
to try next.

Thanks.

withro


When you installed the memory, did you remember to unplug the
computer ? You have to make sure there is no +5VSB present
in the computer. Asus motherboards have a green LED on the
motherboard. If the green LED is glowing, you cannot change
the RAM, You have to switch off the supply (and I unplug mine
just to be safe), wait for the green LED to stop glowing,
and then change the RAM.

You can damage the RAM, or the motherboard, if there is
still power there.

If you still are not making any progress, take the
motherboard out of the computer case and try it on
top of a cardboard covered telephone book. That is what
I use. (I've actually assembled my entire new system build
on a table first, and test the motherboard while it sits
on cardboard.) The cardboard is an insulator, so the bottom of
the motherboard won't short. The thickness of the phone
book, leaves room for the AGP faceplate lip to hang below
the plane of the motherboard. It may be easier to see
the problem, when the motherboard is in the open.

Another last ditch effort, is clearing the CMOS. Check the
motherboard manual for an exact procedure. And just like
the RAM, unplug the computer before you start. That
prevents damage when the clear CMOS jumper is used.
Believe it or not, some motherboards are designed, such
that if you use the clear CMOS jumper while +5VSB is
present, it actually damages a component on the motherboard.
(The component is a dual diode, a three legged device,
and is a common cathode type.) There is no way to predict
which brands and models, use that stupid design "feature".

Paul
.

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