If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
PC won't turn on but not a power supply problem? Please Help....
I'm completely stumped by this one - I have 2 old pentium III 1ghz
computers and I wanted to swap the power supplies over as one was quieter than the other. The only difference between the 2 power supplies was one was the new one had a total output of 135w and the old one was 125w. I swapped them over and it turned on and booted up for about 25 seconds but then the screen went blank, the fan on the CPU stopped spinning and the only activity was a green LED on the motherboard. I turned the PC off and then it wouldn't turn on at all. I checked the new power supply and the fan doesn't spin when I put the power cable in, thus indicating I may have managed to kill it. I have now put the old working Power supply back in and the fan spins when power is attached but the pc won't turn on. Is there a fuse on the motherboard I have may have blown? or have I blown the whole motherboard? Any suggestions on what I should do? Thanks in advance Andi |
#2
|
|||
|
|||
PC won't turn on but not a power supply problem? Please Help....
wrote in message oups.com... I'm completely stumped by this one - I have 2 old pentium III 1ghz computers and I wanted to swap the power supplies over as one was quieter than the other. The only difference between the 2 power supplies was one was the new one had a total output of 135w and the old one was 125w. I swapped them over and it turned on and booted up for about 25 seconds but then the screen went blank, the fan on the CPU stopped spinning and the only activity was a green LED on the motherboard. I turned the PC off and then it wouldn't turn on at all. I checked the new power supply and the fan doesn't spin when I put the power cable in, thus indicating I may have managed to kill it. I have now put the old working Power supply back in and the fan spins when power is attached but the pc won't turn on. Is there a fuse on the motherboard I have may have blown? or have I blown the whole motherboard? Any suggestions on what I should do? Thanks in advance Andi OK, after donning my protective body armor, I think it's safe to point out that it's quite common for a power supply to die and kill a mainboard in the process. If it's any consolation, the power supply would have died soon anyway, so you didn't kill it. -Dave |
#3
|
|||
|
|||
PC won't turn on but not a power supply problem? Please Help....
Is there any way I can check if the motherboard is still alive before I
bin the lot? |
#4
|
|||
|
|||
PC won't turn on but not a power supply problem? Please Help....
There are NO fuses on a motherboard. Either your PSU or your motherboard
has expired. -- DaveW ---------------- wrote in message oups.com... I'm completely stumped by this one - I have 2 old pentium III 1ghz computers and I wanted to swap the power supplies over as one was quieter than the other. The only difference between the 2 power supplies was one was the new one had a total output of 135w and the old one was 125w. I swapped them over and it turned on and booted up for about 25 seconds but then the screen went blank, the fan on the CPU stopped spinning and the only activity was a green LED on the motherboard. I turned the PC off and then it wouldn't turn on at all. I checked the new power supply and the fan doesn't spin when I put the power cable in, thus indicating I may have managed to kill it. I have now put the old working Power supply back in and the fan spins when power is attached but the pc won't turn on. Is there a fuse on the motherboard I have may have blown? or have I blown the whole motherboard? Any suggestions on what I should do? Thanks in advance Andi |
#5
|
|||
|
|||
PC won't turn on but not a power supply problem? Please Help....
DaveW wrote:
There are NO fuses on a motherboard. Either your PSU or your motherboard has expired. While you are right, there are no fuses in the main power lines, I must correct you for the record, USB ports have a special type of fuse. They are polyfuses which will heal themselves (an overcomplicated self-resetting circuit breaker). Other devices will have fuses also. |
#6
|
|||
|
|||
PC won't turn on but not a power supply problem? Please Help....
wrote in message oups.com... Is there any way I can check if the motherboard is still alive before I bin the lot? Yes, but you've already tried a known good power supply. Unless you screwed up a connection somewhere, the mainboard should boot. -Dave |
#7
|
|||
|
|||
PC won't turn on but not a power supply problem? Please Help....
As this is an old P3 motherboard am I correct in thinking that the
mainboard should boot as long as the big 24pin connecter is attached to the motherboard? I didn't mess with the actual power button connector so that should be ok - I can't see anything I have missed - could there be something I have missed? |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
System Failure - CPU Task | JRS | Asus Motherboards | 13 | November 9th 05 07:28 PM |
Unusual Power supply problem | mike | General Hardware | 7 | April 8th 04 04:55 PM |
NF7-S power up problem | Jeff Green | Abit Motherboards | 9 | January 18th 04 07:06 PM |
How can I make motherboard to restart after power loss automatically? | Amiran | General | 1 | September 24th 03 11:35 PM |
Power Surge | David LeBrun | General | 44 | September 12th 03 02:35 AM |