Re: PC has died overnight
- From: VanguardLH <V@xxxxxxxxx>
- Date: Sat, 28 Nov 2009 13:45:52 -0600
Roibert wrote:
My PC consists of a Asus PQ5 Pro board with a Intel Core 2 Duo E7500
2.93Ghx, which I recentlly overclocked to 3.6Ghz using a Titan Fenrir
cooler to keep the temperatures down to about 26C from 38C with a
standard cooler.
RAM is 4Gh of Corsair machted pair (2x 2Ghz)
The PSU is a Tagan TG600.
The OS is Win7 Pro, previously WinXP sp3, and has been running stable
for the last 3 months. I leave it running 24/7 with no problems in the
past. Now when I came to the PC this morning, and tried to bring the
monitor back to life it stayed black and I heard clicking noises coming
from the PC case, with the power led coming on and off.
I switched it off for about an hour then tried again where there was
nothing at all, no clicking, no sign of trying to start, just dead.
I then disconnected all hardware, and took out the cards and tried
starting it again, still nothing.
Any ideas as to what the problem is/? I first thought the PSU, ann was
going to try another one I had but the main plug is only 20 pins and the
board socket is 24 pins as well as another socket being different.
I am aware it could be the board or even the cpu, but I don't want nor
can afford to change the whole lot if I don't have to.
Thanks
A clicking noise. Well, a few components in your computer can do that. One
guess is that the clicking is coming from your hard drive because it cannot
spin up. The surge current when it tries to start to rotate is harmful is
left at that level so the drive protects itself. It keeps trying to start
rotating but cuts out because surge current doesn't wane (the spindle
doesn't move). Could be a seized spindle. Could be a fried voltage
regulator on the PCB on the drive (so there isn't enough torque to get the
spindle spinning). When you power up (and in a quiet room), listen to see
if you hear the whine of the hard drive as it starts to spin up. It should
start at a low pitch and quickly rise up in frequency, something like a
miniature turbine noise. If the fans are making lots of noise, remove the
side panel and disconnect the front and backpanel fans (but not the CPU,
GPU, or chipset fans). Then apply power with your ear next to the hard
drive. If you don't hear it whine then it isn't spinning up. Nothing can
be read from the hard drive until it is spinning.
However, I haven't seen a stuck hard drive (trying to draw its full surge
current because it's seized) that drew so much current that it dropped the
voltate on the 12V rail to make the PSU cut out because it senses a short,
but it could happen. Disconnect power from all hard drives, CD/DVD drives,
case fans (and leave the side panel off), disconnect all USB-attached
devices and other port-connected devices (except mouse and keyboard) to
minimize current draw on the PSU but still leave a semi-bootable system (you
can't boot off the unpowered hard disk but you could use a bootable floppy
with DOS on it if you still have a diskette drive (or you could leave just
one CD/DVD drive powered and use a bootable CD). It's really not important
that you boot an OS versus just checking if the PSU cuts out under a minimal
hardware configuration for power draw. If that works then just add the hard
drive that contains the OS partition from which you boot. If the hard disk
spins up (you hear its whine) and the PSU doesn't cut out so you can boot
stable into the OS then start adding back the disconnected device until the
problem returns. One of them could be shorted (or too little resistance and
drawing too much power that lowers the voltage) and has the PSU cut out to
protect your host. Or your PSU has gotten weak and can no longer maintain
the sustained load of all your devices (or has so much ripple in its output
that devices cannot regulate to a proper voltage on their PCB).
For PSUs with a 24-pin mobo connector, some will hinge the last 4 pins out
of the way. If you need 24 pins, you latch the hinged section. If not, you
swing it out of the way (there may be room around the 20-pin mobo connector
to leave the hinged part swung out and up against the connector). If there
isn't room for the hinged 4-pin section around the connector then use an
Xacto knife to slice the hinge and wire tie the 4-pin part out of the way.
.
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