Please Help me! My case power switch won't work

[Rivka]

I have been trying to set up my system for 10 hours now all the wires are in place as far as I can tell yet when I try to power on nothing happens. The green light on the motherboard is on however. The case is a dynapower 86b2 with a SOYO dragon ultra platnum and a AMD XP 3100. Please help me !!!!!

[PresterJohn]

assuming you've got everything connected properly (and that's not something we can readily tell you)...the only way you'll be able to trouble-shoot this is to use another socket A system and start swapping parts one by one.

i'd start w/the power supply since that involves the least amount of work and you might be that '1-in-a-500' that has a bad PS.

good luck.

ps. try removing the mobo from the case and place on a piece of cardboard to see if you don't have a short somewhere.

[Rivka]

I put in a new power supply ( Antec 430 Watt ATX 12v ) tested that it works but still the system does nothing when the power switch is pressed

[Rivka]

unfortunately all my other systems are 478

[Rivka]

how can I tell if there is a short on the MOBO?

[John Prophet]

Welcome to the forum!

we have had many threads on this...because it is fairly common....and there are many possibilities

could be

power switch not hooked up to right pins on motherboard..double and TRIPLE check that

some boards/vid cards need that extra 4 pins connector for the aux12v from the power supply....so check for that

make sure the cpu fan is plugged into the right fan pins...some boards wont boot if they dont sense that cpu fan there

lots of times what happens is that the motherboard is shorting out or slightly touching the case somewhere....to find out what you do is take the board back out of the case and try booting it outside of the case...what you do is strip out all the extra cards like nics/sound cards/modems etc....get it down to just cpu/heatsink..one stick of ram..vid card......take th emotherboard out of the case and set it on the motherboard box on the antistatic packaging......

try booting it like that and see what happens.....of course the case switches wont be pluged in cuz the wires arent long enough..so what you do is carefully take a flatblade screwdriver (or hard drive jumper) and short the two pins together where the power switch WAS...just short them briefly and the board should start


of course other possibilities are "dead cpu" or maybe something was damaged by static etc



also you can check the cmos clear jumper.....right beside the battery on the mboard should be a little jumper....usually they come set to the "normal" position....but some come set on the "clear" or "reset" position and you have to move it over to the 'normal" position to boot

or if it is on the "normal" position now you can also try resetting the bios by moving that jumper to the 'clear" position for a few seconds...then move it back

JP

[Rivka]

The thing that makes this difficult is that the case came with no manual and a plethora of wires for the front switches and lights

[Rivka]

how can I tell if the mother board requires the extra 4 pin power wires?

[Whir]

Rivka, please stop posting this problem in other threads. If you have any questions about how to use TechIMO, please read our FAQs and policies.

[PresterJohn]

then it might well be just a wrongly swapped connector to the mobo.

you should *seriously* think about swapping that mobo to another case that has clearly marked 'power on' (etc) cables. otherwise, all your troubleshooting is all just shooting in the dark.