Wont boot up or start - cpu fan does spin but switches off
1..Checked main atx plug 24pin and 4 pin power plug. AOK
2..Checked, removed, replaced , 2 sticks of ram AOK
3..Checked, wiring to HD led,PSW + led AOK
4..Disconected Power Plugs and Ribbions to 3 Hard-Drives plus SATA Drives
After checking all of the above, system still did not start or boot up, however intermittenly when you press the switch the cpu fan would spin then stop.
Finally I changed the PSU from another machine that was working, and Yes it booted up and I was able to do whatever. UNTILL 5 hrs later
same problem again.I'am at a loss , where do I go from here. ?
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Re: Wont boot up or start - cpu fan does spin but...
You seem to have a lot of hardware in there, so trying to remove some items to lighten the Power Load was a good idea - but maybe too late.
Check your Power Supply - I suspect that you will need around 550 Watts or more. If you can put in another Power Supply (after disconnecting as many drives etc as you can) see if the problem re-occurs.
If it does not, then your Power Supply is failing and will need to be replaced (with a 550 Watt or above PS Unit). I would personnally think that a 700 Watt unit would be ideal if it were my machine.
Yeah, I know you said you replaced the Power Supply but didn't say if everything was reconnected nor what size Power Supply Unit you put in.
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The actual Processor fan connects to the CPU Fan header on the mainboard. It's 4 small pins. It plugs in right near the CPU socket on the mainboard. Check the user manual for exact placement, you may download it from the AOpen website if you don't have one already.
Plug in the 20Pin connector if that is the most Pins that the mainboard will allow. Cable tie the other 4Pins back onto the 20Pin connector.
Then if there is additional 4Pin connector required by the mainboard for CPU power and you don't have that connector on you power supply, you will need to purchase a Molex to 4Pin CPU power connector. When you go to the computer store check with them that all is correctly connected.
verify that the monitor is working if you can. Is the hard drive lite lighting up, If not try removing and reseating the ram. if the hd lite in on then it would sound like the graphics card is out, try replacing it.
Hello,have you installed new motherboard or CPU? Follow these steps again 1) Disconnect the power cord from the back of the
computer & open up the case.
2) Wear an anti-static glove or
at very least discharge your static by touching a metal surface or power supply
Disconnect the main 20pin ATX power connector from the motherboard
& the square 4pin ATX2 power connector
4) Remove any PCI
cards you have & disconnect ALL drive cabling from the MOTHERBOARD.
Also disconnect any internal USB fly leads from the motherboard.
You should now have ONLY the cpu+heatsink/fan, memory & video card
installed. Locate the round silver battery in the bottom right corner of
the board. Just below it, you'll see a plastic jumper cap. This cap
should be covering 2 pins (pins 1 + 2) with pin 3 bare. It will be
marked JP1. Move the jumper to cover pins 2-3 instead. Leave in this
position for about 30 seconds, then return the jumper to its original
position (pins 1-2).
6) Reconnect the square 4pin ATX2 power
connector & the main 20 pin ATX power connector. Make sure that the
case speaker or buzzer is connected also.
7) Make sure the only
external devices connected are the keyboard/mouse & monitor.
Reconnect the power lead & power on the system
It is more than likely that when your old power supply died a death, it damaged some components on the motherboard. Replace the Motherboard and chip, and you should be back in business. You can pick up some good value bundles to save money on buying the parts seperately. The power supply working again after turning off and on, is because there is a little trip in the power supply that triggers when it detects a fault. Powering down resets that trip allowing it to try and work again.
have you placed the 4 pin block to the motherboad and also check the bois clr jumper to see if it's not being shorted this can also cause the board not to boot pluse check ram sticks making sure they are well seated and clean the cntacts from dirt on the ram sticke if al gose well and still no boot then get a converter and try this if all else fail try a ney cpu if same resaults then replace board.
Your description indicates your power supply may be faulty or there is a break somewhere in the 24 pin main ATX cable wiring.
Swap out the power supply. Make sure your PSU has a 24 pin ATX connector & (not a 20) pin & a 4 pin ATX_12v connector for the CPU.