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| Thread ID: 66103 | 2006-02-11 01:35:00 | CRT Monitor Fluctuations | pepper2 (8629) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 429213 | 2006-02-11 01:35:00 | I have a CRT colour monitor that has started having fluctuations in brightness and possibly minor changes in colour. It is quite irregular. I suspect it may be a hardware problem and what I would like to know is it likely to be the monitor or the display adapter (video card)? Relevant specs are: Purchase date July 2003 Monitor 17 inch PC Company Dynaflat (Likom) Display adapter NVIDIA GeForce FX5200 (128 mb) CPU AMD Athlon XP 3000+ 512 RAM Motherboard Chaintech 7NJL1 Apogee XP Home Thank you |
pepper2 (8629) | ||
| 429214 | 2006-02-11 01:55:00 | Almost certainly the monitor. Some CRTs (especially cheaper ones) don't last too long - there is a whole bunch of dodgy ones at my work for instance. Borrow one from someone else or buy a secondhand one for cheap, to confirm. Some other PressF1er may have first hand experience with the PC Company branded monitors.. |
gibler (49) | ||
| 429215 | 2006-02-11 02:07:00 | I have a CRT colour monitor that has started having fluctuations in brightness and possibly minor changes in colour. It is quite irregular. Most likely your monitor. If possible try it on another computer, or try another monitor on your computer. If it has a three year warranty you are probably in luck, otherwise you may be in the market for a new one. Check the obvious though, like making sure the monitor plug is firmly seated in your video card. A lot of people don't bother to do up the securing screws and the plug can creep out. From memory the PC Company was not known for supplying quality monitors, so its future may not be looking too bright, if you'll pardon the pun.:D Cheers Billy 8-{) |
Billy T (70) | ||
| 429216 | 2006-02-11 09:38:00 | my work monitor does the same. i switch it off every now & then + degausse it, then it settles down. when it dies completely then i'll cough for another | Phil B (648) | ||
| 429217 | 2006-02-11 10:02:00 | Have you got any speakers situated near it? Would be a good idea to move them away, I ruined a monitor doing that, although, luckily it was about to be tossed anyway. | Haze (3028) | ||
| 429218 | 2006-02-11 20:00:00 | Thank you for the suggestions. I have degaused the monitor in the last week. There are no speakers near the monitor. The monitor sits on a shelf all by itself so it is not too likely to get interference from peripherals. I will have another closer inspection of cable connections, etc. I may be able to swap a monitor to make a more definitive test. With the folding of the PC Co I doubt if there is any warranty worth chasing! Thanks |
pepper2 (8629) | ||
| 429219 | 2006-02-12 01:58:00 | Hot weather, no desk fans or other magnetic field producers near the monitor. Other thing to try is reset to factory default. Got similar monitor that erratically during bootup shimmers on vertical sides or goes hourglass and then flicks back to full screen ?power supply. Got a spare CRT and will keep the dodgy PC Co running until it decides the time is right for a free trip to the dump. | FrankS (257) | ||
| 429220 | 2006-02-12 03:51:00 | I have degaused the monitor in the last week. There are no speakers near the monitor. The monitor sits on a shelf all by itself so it is not too likely to get interference from peripherals. Degaussing is demagnetisation to remove screen discolouration caused by stray magnetisation. It has nothing whatsoever to do with any other faults, apart perhaps from smoke (if the degauss circuit burns up) or a dead monitor if it fails and blows the main fuse. Brightness fluctuations are caused by faults in the screen drive circuits, or very occasionally the video connection or a very rare video card fault. It will not be caused by interference from peripherals. FrankS: The shimmer/hourglass effect is a scan circuit problem, probably a bad solder joint on a component that gets hot. If repaired before total (terminal) failure it will not reoccur. However, it is a possible fire risk so don't leave the monitor running unattended, especially at night if you don't have smoke alarms. Degaussing imposes a huge magnetic pulse on the monitor screen, which is why you can hear it happening, and it could well be the physical impact of that pulse that disturbs the defect in your monitor and temporarily allows it to return to normal. You might get the same result by whacking your hand on the top of the monitor, or thumping the front of the screen with the side of your fist. Cheers Billy 8-{) |
Billy T (70) | ||
| 429221 | 2006-02-12 20:46:00 | Thanks Billy T, shimmer etc only occurs erratically when monitor is stone cold and is booted up first thing in morning, monitor has about 16,000 hours and getting near the end of it's life, suspect any repair attempt will produce more problems. Have smoke alarm above the driving seat and will minimise leaving monitor unattended.Problem only started in last week or so, curious to know why a bad joint would develope after 16000 hours, ?fatigue | FrankS (257) | ||
| 429222 | 2006-02-12 21:06:00 | You might get the same result by whacking your hand on the top of the monitor, or thumping the front of the screen with the side of your fist.You may have went to the same fixit school I went to. Some car problems can also be fixed with a carefully placed boot to the tyre or a smack down ontop of the dash. :D |
Rob99 (151) | ||
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