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| Thread ID: 93482 | 2008-09-18 10:08:00 | Flickering Monitor | electricdave80 (14192) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 706182 | 2008-09-19 07:28:00 | IIRC degaussing only fixes magnetic interference. It won't fix flickering. YRP-C Degaussing eliminates magnetisation caused by the earth's magnetic fields (and sometimes adjacent weakly-magnetised ferrous metals). CRT monitors are happiest when aligned North-South and setting up East-West usually requires a little more degaussing than usual to get the colour purity right. CRTs also come in northern hemisphere or southern hemisphere versions so that the picture sits in the centre of the screen. Stand a monitor on its head and the image will move sideways. Just a few more little-known useless facts to help you while away the time as you patiently wait for the delayed telecast of the Warriors game, but you are right, it won't fix flickering. :D Cheers Billy 8-{) |
Billy T (70) | ||
| 706183 | 2008-09-19 11:13:00 | A failing or inadequate P C power supply will sometimes display CRT monitor flicker irrespective of refresh settings. | PENTIUM (426) | ||
| 706184 | 2008-09-19 11:43:00 | Hi One of the most common causes of CRT flicker is High Voltage Arc Over. This mostly happens when dust, dirt and other crap gets attracted to the rear of the CRT tube around the High Voltage Inlet. This is a rubber sucker thing. You can clean it off with WD-40 but be very aware high voltages abound even if the monitor is unplugged and off. This high voltage can and will kill you. If you don't know what you are doing leave it to a professional serviceman. The next life you save may be your own!! Do not allow high voltage arc over to continue. This condition puts extra strain on other components and they will soon fail. BURNZEE |
Burnzee (6950) | ||
| 706185 | 2008-09-20 06:44:00 | One of the most common causes of CRT flicker is High Voltage Arc Over. BURNZEE That's news to me! You'd get more than flicker if you had an EHT arc-over. There would be an almighty bang because the CRT represents a large storage capacitance and the arc current is very high. The discharge current often kills the electronics as well, you don't get many second chances when EHT flashes over. Alternatively, if there is a high resistance path (surface gunk) between the EHT Rose and ground, there will usually be a pronounced sizzling noise and in the rare instances when the image is disturbed by this, rather than a flicker you get a line by line displacement or "jagged" image. In all my (considerable) years in electronics and in dealing with HV equipment, I have never seen EHT leakage cause screen flicker, and in modern equipment such leakage is extremely rare to the point of virtual extinction unless operating in a very humid and polluted atmosphere such as kitchens, chain smokers, kerosene heaters, industrial plants, living in a swamp etc. The cause is most likely to be one of the other options mentioned, from equipment failure through to electromagnetic interference. Cheers Billy 8-{) |
Billy T (70) | ||
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