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| Thread ID: 34475 | 2003-06-14 02:55:00 | Loud power supply | pleasehelp (882) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 152462 | 2003-06-14 02:55:00 | Hi Have got a PC Company box, lately the power supply has starting up when i boot with a really loud noise coming from it, it used to go away after about 3 - 4 minutes so i put up with it, this happened for about a year. This only happened when it was cold ie winter. The problem has started again with winter temperatures, but now the noise will not stop at all, can anyone tell me what is happening? Should i buy a new power suply or can i put oil on some part of the psu or something? Help much appreciated |
pleasehelp (882) | ||
| 152463 | 2003-06-14 03:18:00 | Hi One more thing I should mention, if I turn the pc off and them turn it on the noise goes away as well. |
pleasehelp (882) | ||
| 152464 | 2003-06-14 03:40:00 | It sounds like the fan is dieing. Adding a bit of oil or CRC to the hub of the fan will fix it atleast in the short term. But you are probably better to replace it. You will have to track down which fan it is by taking off the case and having a look. You will probably have to use your finger to identify which fan is causing it. My guess is its probably not the PSU fan. |
bmason (508) | ||
| 152465 | 2003-06-14 03:47:00 | Well, it’s probably the fan and a drop of oil will fix. The question is how competent do you feel about diving into the depths of the machine? It’s really a simple job but a lot of people get a little scared off when it comes to physically pulling computers to pieces. If you have, and can use a screwdriver you’re looking at about 20min work. |
B.M. (505) | ||
| 152466 | 2003-06-14 16:31:00 | If you plan on getting out the oil can, this should help: www.techrepublic.com Cheers. PS. I have the same prob with a PC Co puter. Been meaning to give it a go. |
*Sparky* (311) | ||
| 152467 | 2003-06-14 23:34:00 | Sparkys reference site is quite good, but it misses out a couple of points. The centre of the fan hub usually has a self-adhesive small metal foil sticker over the access hole, and sometimes there is also a small rubber or plastic sealing disk as well that has to be prised out. These self adhesive stickers wont stick back on again, and especially if any oil gets onto them. Sometimes if you are careful just the edge of a sticker can be lifted and a drop of oil put in the hole using an instrument screwdriver for want of a tiny dispenser, and it will stick back again. Otherwise a clean up with white spirit and stick it back with a bit of "Ados". The other point and maybe more important is that the oil in the porous metal sleeve bearing is put there under a vacuum, and it only flows one way, that is outwards. , though there is some re-circulation within the bearing due to small pressure differences. Surface tension prevents most added oil getting back into the bearing metal. So re-oiling is only a short term measure, you may find you have to do it fairly frequently once a fan starts making noises. |
Terry Porritt (14) | ||
| 152468 | 2003-06-15 04:28:00 | Thanks for all the posts and help, from what I can gather I may as well get a new power supply to get a more permanent solution to this problem. Does anyone know why it only happens if it is quite cold? I'll be interested to find out. Thanks |
pleasehelp (882) | ||
| 152469 | 2003-06-15 05:25:00 | The metal shaft and bearings expand when hot. They are at their smallest when cold. Any remaining lubricant will be semi-solid when cold and cannot move to where its needed Its a purely mechanical issue. |
godfather (25) | ||
| 152470 | 2003-06-15 09:01:00 | getting a new psu may not be an optoin. some of those pc compamy pcs use a werid sized psu, a standard size one may not fit. all you need to do it change the fan which is fairly easy to do and a whole lot cheaper than changing the psu. | tweak'e (174) | ||
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