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| Thread ID: 37765 | 2003-09-17 11:28:00 | Power Supply making weird sounds | Carnie (3350) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 176006 | 2003-09-17 11:28:00 | At least i think its my power supply. It sounds similar to a cdrom drive spinning but not as high pitch. Ive checked the cdrom drives and its not them. My cpu is running sligtly hotter and the fan is now spinning @ 6250rpm, when it used to be about 5800rpm. What would be the best way to diagnose a power supply problem?? |
Carnie (3350) | ||
| 176007 | 2003-09-17 12:12:00 | Power supplies usually fail completely or cause freeze's resets etc.. Only way to test is with multimeter while PC is under load such as scandisk and check DC voltages and ripple. Other way is to substitute another power supply. More chance it is a fan that is worn or in need of lubrication. You can normally stop the any fan, EXCEPT FOR CPU FAN, for short time to ascertain if it is causing the noise. |
Pheonix (280) | ||
| 176008 | 2003-09-17 12:22:00 | It could be your power supply making the noise. Without hearing it or knowing what type of power supply it is, it is hard to say what is causing the problem. Some power supply faults can produce noises, like if a capacitor goes you can get a whistling noise or if there is a short you can get a high pitched squeal. You have to be careful when looking at power supplys because if you don't know what you are doing it could be the last thing you do (high voltages could be present). I assume you don't have any electrical experience. If you think the noise is coming from your power supply you should be able to tell by sticking your ear next to the power supply. Seeing that your fan speed has dropped and your CPU temp is up it could suggest that one the voltages has dropped. This would mean measuring the voltages comimg out of your power supply. This is best left to someone who knows what they are doing. You would need to know what voltages are on what pin. This you can get from your motherboard manual. I recommend that you let an expert look at it. |
Jeff (1070) | ||
| 176009 | 2003-09-17 12:49:00 | I have not followed your previous posts so don't know your exact problem but I had a PC the other day which was rebooting and while the cpu fan was still spinning I determined that all was not well with it by briefly disconnecting it and starting the PC. Having installed another cpu fan, he luckily had, all is now well. What amazed me was the fact that there was a case fan which had not even been connected. | mikebartnz (21) | ||
| 176010 | 2003-09-17 13:35:00 | Your cpu fan is running at 6250rpm now. Thats spinning for a cpu fan what size is it 60x60. Fast fans make a higher pitched nose than slower fans if its running faster than before the pitch and volume will go up. You need to find out why its spinning faster, is the control faulty, dust and fluff blocking the air flow or something else in the electrical system or cpu itself. How hot is the cpu and what is it? Cheers Murray P |
Murray P (44) | ||
| 176011 | 2003-09-17 23:16:00 | "Everything" is interdependent, if the psu fan has clogged bearings and running slower and noisier, then the air temperature in the case will be higher and so the cpu temperature will be higher. If you have a variable speed cpu fan, then it may be going flat out as a result. | Terry Porritt (14) | ||
| 176012 | 2003-09-18 02:33:00 | Ok thanks, im thinking i will just take it into my local computer shop and get them to take a look. With the summer coming up i think i might just get a new psu & case with an extra fan, just to be sure. For reference my computer is a pc-company AMD1700+. It used to have a temp of about 40, and now its about 50. |
Carnie (3350) | ||
| 176013 | 2003-09-18 02:46:00 | Whip the case off and check for fluff or loose cables in and around the fans and grills. Start it up and use a pencil to momentarily stop the PSU and CPU and video card fans to determine which one is making the noise. Also check the inlet vents (often tucked away at the bottom front) for blockages. Cheers Murray P |
Murray P (44) | ||
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