Not All Devices are turning on
Posted 17 May 2005 - 12:30 PM
Posted 17 May 2005 - 12:51 PM
Has anything changed (ie hardware added, removed etc) before this problem occured?
Also, do you hear any beeps after you turn the system on?
Posted 17 May 2005 - 01:05 PM
Posted 17 May 2005 - 01:25 PM
Was this a synthetic brush you used?
Also, I still need to know if you hear any beeps after you power on.
Posted 17 May 2005 - 01:30 PM
Edited by DarkMystic122, 17 May 2005 - 01:31 PM.
Posted 17 May 2005 - 02:06 PM
Anyway, on to the immediate problem.
I want you to try a few things (I suggest you wear a static strap before doing this) :
1. Disconnect the power lead from computer & then disconnect the internal power connector (20 pin ATX connector) that goes to the motherboard.
2. Remove all PCI cards from the system leaving only the video card in place. (make a note of what cards go in which slots though, so you can replace them later in the same order)
3. Disconnect all drive cabling at the motherboard (ie hard drive, optical drives, floppy drive). Leave the cables connected to the drives themselves though if you wish. Unplug the power lead to the hard drive but leave power connected to the optical drives.
4. Disconnect all external devices except for the keyboard & monitor.
5. Locate the Clear CMOS jumper & set it to clear for approx 10 seconds. If you don't know how to do this, tell me & I'll explain.
6. Reconnect the internal power to the motherboard & then reconnect the PSU's external power lead.
Try to boot the system again.
Posted 18 May 2005 - 01:39 PM
Posted 18 May 2005 - 03:25 PM
First you need to locate the clear cmos jumper on the motherboard - if you have the motherboard manual handy then you can look it up in there. Otherwise I tell you how to locate it without that :
1. The motherboard should be relatively free from obstruction by now as you will have unplugged all the drive cabling from it by this stage. Look for the bios battery - this will be a small silver disc shaped battery that is mounted on the motherboard.
The jumper you want should be the one closest to this battery. It will consist of 3 pins but two will be covered by the plastic jumper cap. It is usually labelled something like CLR_CMOS or CL_RTC etc. The keyword to look for will be either cmos, bios or RTC (real time clock). Occasionally its refered to as CLR_PSWD (password).
If you have more than one jumper header near the battery & you can't figure out which one is which, let me know what each are labelled & I'll tell you the right one.
2. Once you have found it, you will see that the jumper is placed over pins 1+2
[ . . ].
1 2 3
If the pins aren't marked with a number, don't worry just assume that the jumpered pins are 1+2.
Reposition the jumper so that it covers pins 2+3 instead. Leave it like this for 10 seconds or so then return it to it's original position (pins 1+2).
Posted 19 May 2005 - 10:44 AM
Edited by DarkMystic122, 19 May 2005 - 10:45 AM.
Posted 19 May 2005 - 02:14 PM
Do the keyboard lights flash up quickly after powering on?
Are there any beeps?
When you pressed the eject button on the CDROM, did the light on the front of it come on?
Posted 20 May 2005 - 11:02 AM
Posted 20 May 2005 - 06:22 PM
Then boot it up again. You should hear lots of beeps (Make sure the system speaker is connected obviously).
If you don't hear any beeps, remove the video card as well, then power up the system. Again check for beeps.
Let me know if you hear any.
Also, let me know what the exact make & model of your motherboard so I can look it up.
Do you happen to have another power supply you test the system with as well?
Posted 22 May 2005 - 04:32 PM
Posted 22 May 2005 - 04:49 PM
Posted 22 May 2005 - 07:00 PM
[. . . .] (4 to 6 of these connect to optical devices and hd)
[: : : : : : : : : : :]or[: : : : : : : : : : :] (main mb power, both work)
[....] (connects to floppy)
[: :] (atx power for pentium 4 and higher end AMDs. connects to mb under cpu)
[: : : :] (like the 4 pin atx, but for bigger P4s)
[----] (auxilary power for some MBs)
make sure if there is a slot for it, its plugged in firmly.
make sure the psu is also at least 350wts
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