cpu fan working but no light displayed on casing monitor no signal

guohao · 11-25-2008, 04:34 AM

i was having a problem with my computer, i thought it was the motherboard problem or the processor thus i replaced them. after that
with the new hardware, the monitor no signal, mouse no power keyboard no respond, but the cpu fan, graphic card fan are working. plus the lights on the casing that are suppose to flash at the start is dead. the casing light the the 'on' button is dead also..... i tried popping up rams graphic card checked all connections, there seems to be nothing wrong.
so i thought maybe it is the power supply 's probem.

spec:
mother board:G31M3-f
ram:2x 512mb kinston
graphic card: ATI1600pro 256
harddisk:120gb

anyone pls guide me to solve this problem.
thankyou!

my power supply is 300w

dai · 11-25-2008, 07:21 AM

you need to be up here with pcie
http://www.newegg.com/Product/Produc...corsair%2b550w

guohao · 11-25-2008, 06:03 PM

i was using the pcie card, but without this problem.... i'll get a new power supply anyway.

guohao · 11-25-2008, 10:20 PM

i replaced the PSU with a cooler master 460W. but it diesnt seems to solve the problem, my. the monitor still recieves no signal and the casing lights fails also. can it be the new motherboard problem or the CPU's problem. ?

dai · 11-25-2008, 10:47 PM

i would not run a pcie with less than a 550w

11-25-2008, 04:34 AM	#1 (permalink)
guohao Registered User Join Date: Nov 2008 Posts: 4 OS: xp	i was having a problem with my computer, i thought it was the motherboard problem or the processor thus i replaced them. after that with the new hardware, the monitor no signal, mouse no power keyboard no respond, but the cpu fan, graphic card fan are working. plus the lights on the casing that are suppose to flash at the start is dead. the casing light the the 'on' button is dead also..... i tried popping up rams graphic card checked all connections, there seems to be nothing wrong. so i thought maybe it is the power supply 's probem. spec: mother board:G31M3-f ram:2x 512mb kinston graphic card: ATI1600pro 256 harddisk:120gb anyone pls guide me to solve this problem. thankyou! my power supply is 300w Last edited by dai; 11-25-2008 at 07:23 AM.

11-25-2008, 07:21 AM	#2 (permalink)
dai Manager, Hardware Forums Join Date: Jul 2004 Location: west australia Posts: 56,746 OS: win 7 32x 64x rtm	Re: cpu fan working but no light displayed on casing monitor no signal you need to be up here with pcie http://www.newegg.com/Product/Produc...corsair%2b550w __________________

11-25-2008, 06:03 PM	#3 (permalink)
guohao Registered User Join Date: Nov 2008 Posts: 4 OS: xp	Re: cpu fan working but no light displayed on casing monitor no signal i was using the pcie card, but without this problem.... i'll get a new power supply anyway.

11-25-2008, 10:20 PM	#4 (permalink)
guohao Registered User Join Date: Nov 2008 Posts: 4 OS: xp	Re: cpu fan working but no light displayed on casing monitor no signal i replaced the PSU with a cooler master 460W. but it diesnt seems to solve the problem, my. the monitor still recieves no signal and the casing lights fails also. can it be the new motherboard problem or the CPU's problem. ?

11-25-2008, 10:47 PM	#5 (permalink)
dai Manager, Hardware Forums Join Date: Jul 2004 Location: west australia Posts: 56,746 OS: win 7 32x 64x rtm	Re: cpu fan working but no light displayed on casing monitor no signal i would not run a pcie with less than a 550w __________________