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| Thread ID: 54658 | 2005-02-18 09:22:00 | Blown Power Supply? | Mcam (7363) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 326199 | 2005-02-18 09:22:00 | I just switched my computer off. Waited for a few minutes (Had to reboot at the request of a helpdesker) then went to restart it, and nothing. Pushing the power switch does nothing at all. I checked the power cord, and its in. I even tried another power cord, but this does nothing as well. I opened the case, and the LED on the motherboard is lit, but nothing powers up. Is this indicative of a blown Power Supply? If so, I'll get a replacement in the morning and fit it. Regards, Mike |
Mcam (7363) | ||
| 326200 | 2005-02-18 09:31:00 | try taking a sniff behind the computer where the fan for your power supply is. if it smells burnt thats usually a very good indication that PS has gone. but from what you have written I'd say its not broken. what are the specs of your computer anyway? |
bob_doe_nz (92) | ||
| 326201 | 2005-02-18 09:32:00 | Hold off on the new PSU for the mo. Why were you contacting a help desk? If the LED is lit, I'd suggest it's getting power, with the power definitely off, hit the reset button then turn the power back on, does the LED still light up? |
Murray P (44) | ||
| 326202 | 2005-02-18 09:59:00 | Is the fan on the power supply unit going ?, somtimes a indicator of the health of a power supply unit | beama (111) | ||
| 326203 | 2005-02-18 10:02:00 | When you perss the power button, does the LED on the mobo go off?? | ScaredEye (7358) | ||
| 326204 | 2005-02-18 18:55:00 | turn off the power at the wall disconnect the psu plugs from their connections in the computer then using the MAIN powersupply plug form the motherboard have a handy paperclip ready......bend the paperclip into a U shape and stuff one end into one of the plug holes which has a BLACK wire goin to it on the plug near the middle and the other end into a hole wiht a GREEn wire goin to it then turn on the power at the wall.....if the psu fires up and the fan spins then it's ok most likely.... if it works then plug in the main plug back onto the mobo and if your system isa P4 then plug in the square plug as well cause the cpu will need it for power. and plug in say the harddrive power as well but leave all else unplugged. Then if that works start plugging in other stuff one at a time. I recently had a situation where a system just woulndt fire up if the floppy was plugged in guess the floppy was stuffed. | drcspy (146) | ||
| 326205 | 2005-02-18 19:40:00 | I was calling the helpdesk because I my speed with Ihug's Bliink is absolute sh#* :) The fan isn't going on the power supply at all . And, the LED on the mobo stays on when the power switch is pressed . If I disconnect the power, then reconnect it, and press the switch, the CPU fan does a slight movement, and another LED near the CPU flickers . Through all of this, the motherboard LED stays on . I haven't tried the paperclip thing yet, although all the components were were working flawlessy prior to this happening . My educated guess is that it appears to be a power supply . I've had a dud floppy drive before, but the system would still boot . This system is a P3 1 Ghz Intel CPU with an Asus Black Pearl motherboard, 512Gb ram . For the cost of a $40 powersupply, it might be worth eliminating that as the problem, and replacing it :) |
Mcam (7363) | ||
| 326206 | 2005-02-18 19:44:00 | Actually.... more like a $70 power supply. :/ | Mcam (7363) | ||
| 326207 | 2005-02-18 21:05:00 | The idea of pushung the PC switch while the power is off, is to discharge any current from the capacitors that might keep the LED lit for a time but without power getting to the board . It just a way of eliminating residual current held . It seems like it's getting some juice anyway, even if that may not be the full quota . I'm a bit doubtful on the safety aspects of stuffing paper clips into power appliances :@@: but the rest of the diagnostic Drcspy gave looks good . Do you have access to someone with a multi-meter? |
Murray P (44) | ||
| 326208 | 2005-02-19 01:19:00 | It looks as if your power supply is not starting up fully . An ATX supply is actually two supplies . There is a 5V low current supply which is on all the time it has mains . That's the standby supply which provides for the "power switch" and any peripherals which can be used to cause remote starting (like modem and network interface) . And that LED on the motherboard . ;) If the fan just kicks and another LED flickers when you try to start the supply, that indicates that the main supply is coming up, but shutting down immediately . That means that either it is overloaded (something shorted or just pulling too much current) or it has lost its regulation and is being shut down to protect the expensive stuff . You could try unplugging the disks . . . it's probably only the 12V supply which could cause a shutdown without smoke . The 5V and 3 . 3V supplies are grunty enough that an overload shutdown would usually show other symptoms . Like silicon smoke . But my guess is that it's a PSU fault . Of course I could be wrong . |
Graham L (2) | ||
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