Posted 11 June 2005 - 02:45 PM
Posted 11 June 2005 - 04:23 PM
Does your system show all the normal signs of booting up, except for the monitor?
i.e. do the keyboard lights flash up once just after powering on?
do you hear the hard drive spin up?
Does the system emit any beeps at all?
Also, what are your system specs - motherboard/ram/graphics/cpu etc?
Posted 11 June 2005 - 04:54 PM
Posted 11 June 2005 - 05:00 PM
Edited by mojo34, 11 June 2005 - 05:02 PM.
Posted 11 June 2005 - 06:08 PM
Disconnect the power from the computer
Open up the case & disconnect the main internal power leads to the mobo.
Remove all add-on cards except video.
Disconnect all the drive cabling from the motheboard itself.
Remove any external devices except keyboard & monitor
Clear the bios using the clear cmos jumper for at least 10 secs (if you don't know how, then tell me)
Reconnect the internal power leads to the motherboard
Try & boot the system again.
Let me know if you hear any beeps, whether the keyboard lights flash etc
Posted 12 June 2005 - 05:34 AM
Edited by mojo34, 12 June 2005 - 10:38 AM.
Posted 12 June 2005 - 12:42 PM
The jumper itself should originally be positioned over pins 1-2. You need to place it over pins 2-3 instead, for 10 secs or more. (Make sure the power lead to the motherboard is disconnected first). After 10 secs, return the jumper to its original position (pins 1-2).
Then reconnect power & try to boot.
Posted 12 June 2005 - 01:46 PM
Edited by mojo34, 13 June 2005 - 02:37 PM.
Posted 14 June 2005 - 02:52 PM
Also, can you tell me if anyone has disturbed the heatsink/fan assembly at any point during or just before this problem started?
Posted 15 June 2005 - 01:26 AM
Posted 15 June 2005 - 08:00 PM
There is a jumper next to the hard drive controller ports & above the floppy port that selects the CPU FSB. Let me know if this jumper is covering both pins or whether it is missing.
If missing or not covering both, then fsb is 100MHz. If over both pins, its 133MHz. As we don't know the speed of the cpu, I suggest you remove the jumper & set fsb to 100.
Its possible the cpu has overheated at some point. It may be worth reapplying some thermal paste - remove heatsink/fan & cpu. Clean old compound off of hsf & cpu using antistatic cleanser. Then reinsert cpu, spread a pea sized blob of thermal paste over the centre of cpu & attach the hsf.
Posted 16 June 2005 - 03:18 AM
Edited by mojo34, 18 June 2005 - 08:43 AM.
Posted 18 June 2005 - 03:58 PM
I suggest the next step is to remove the motherboard from the case.
Place it on a pile of matt paper or card, leave the cpu/ram in place.
Remove/reinsert the video card. (If the system has onboard video as well, use this instead & leave agp/pci video out. Remove any other cards & peripherals.
Disconnect all drive cabling again from mobo.
Reconnect the PSU to the motherboard & one hard drive or optical drive only. (power only, no ribbon cable)
As the wires that connect the case switches/LEDS probably won't reach the board whilst out of case, you will have to start the system manually.
In bottom right corner of board (where switched/leds) would normally connect, you will see the front panel header - labelled JFP1.
This is made up of 2 rows of pins. Locate the bottom 2 pins in the left row. ie
this is not accurate diagram but should give you the idea - xx are the 2 pins you need. When the psu is switched on (ie on back or at wall socket), use a flat bladed screwdriver & briefly touch these 2 pins together. This should start the system up.
Let me know what happens.
Posted 19 June 2005 - 11:59 AM
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