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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Viewsonic PF790 missing red
On 21 Aug 2006 13:46:12 -0700, "Mughoj" wrote:
Hi, My wife's monitor lost the red color entirely the other day. The monitor has been working fine with no visible signs of ageing. The picture is still very sharp and bright, but red went away in an instant, while she was using the computer. So i'm wondering, if anyone has a qualified guess, what most likely have popped. If anyone know of a good guide to monitor troubleshooting/repair i'm interested as well. I have googled a great deal for this, but haven't found what i'm looking for. I'm not entirely sure i can fix this (even with a little help), but it can't hurt trying (50.000V don't hurt, does it :P). Besides, my wife is constantly gapping about how bad her substitute monitor is, so i'm desperate Mugge There were a few Viewsonic monitors that had problems with the video output IC failing and causing them to lose a color. The IC in these monitors was expensive and in short supply (I think they were around $100). Andy Cuffe |
#2
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Viewsonic PF790 missing red
Andy Cuffe wrote:
On 21 Aug 2006 13:46:12 -0700, "Mughoj" wrote: Hi, My wife's monitor lost the red color entirely the other day. The monitor has been working fine with no visible signs of ageing. The picture is still very sharp and bright, but red went away in an instant, while she was using the computer. So i'm wondering, if anyone has a qualified guess, what most likely have popped. If anyone know of a good guide to monitor troubleshooting/repair i'm interested as well. I have googled a great deal for this, but haven't found what i'm looking for. I'm not entirely sure i can fix this (even with a little help), but it can't hurt trying (50.000V don't hurt, does it :P). Besides, my wife is constantly gapping about how bad her substitute monitor is, so i'm desperate Mugge There were a few Viewsonic monitors that had problems with the video output IC failing and causing them to lose a color. The IC in these monitors was expensive and in short supply (I think they were around $100). Andy Cuffe Perhaps going back to basics first, it may be that you've even checked this already, but i've seen this happen in a few monitors in my time if one of the pins in the svga cable gets bent, broken, or if the cable just fell out a little bit. I remember one time a friend of mine who shall remain anonymous phoned up panicing because he had quite the opposite - his screen went all red and he thought it had gone into satanic mode!?! turns out the cable had just fallen partially out. The pin for red video is pin 1, googling returns this site : http://www.interfacebus.com/Design_SVGA_PinOuts.html which has a nice pin out of the svga lead. Mark |
#3
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Viewsonic PF790 missing red
I personally recommend hitting the monitor, very hard if necessary. If
the red comes on, there is a loose wire or solder joint. Mark Fortune wrote: Andy Cuffe wrote: On 21 Aug 2006 13:46:12 -0700, "Mughoj" wrote: Hi, My wife's monitor lost the red color entirely the other day. The monitor has been working fine with no visible signs of ageing. The picture is still very sharp and bright, but red went away in an instant, while she was using the computer. So i'm wondering, if anyone has a qualified guess, what most likely have popped. If anyone know of a good guide to monitor troubleshooting/repair i'm interested as well. I have googled a great deal for this, but haven't found what i'm looking for. I'm not entirely sure i can fix this (even with a little help), but it can't hurt trying (50.000V don't hurt, does it :P). Besides, my wife is constantly gapping about how bad her substitute monitor is, so i'm desperate Mugge There were a few Viewsonic monitors that had problems with the video output IC failing and causing them to lose a color. The IC in these monitors was expensive and in short supply (I think they were around $100). Andy Cuffe Perhaps going back to basics first, it may be that you've even checked this already, but i've seen this happen in a few monitors in my time if one of the pins in the svga cable gets bent, broken, or if the cable just fell out a little bit. I remember one time a friend of mine who shall remain anonymous phoned up panicing because he had quite the opposite - his screen went all red and he thought it had gone into satanic mode!?! turns out the cable had just fallen partially out. The pin for red video is pin 1, googling returns this site : http://www.interfacebus.com/Design_SVGA_PinOuts.html which has a nice pin out of the svga lead. Mark |
#4
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Viewsonic PF790 missing red
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#5
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Viewsonic PF790 missing red
Mark Fortune wrote:
Andy Cuffe wrote: On 21 Aug 2006 13:46:12 -0700, "Mughoj" wrote: Hi, My wife's monitor lost the red color entirely the other day. The monitor has been working fine with no visible signs of ageing. The picture is still very sharp and bright, but red went away in an instant, while she was using the computer. So i'm wondering, if anyone has a qualified guess, what most likely have popped. If anyone know of a good guide to monitor troubleshooting/repair i'm interested as well. I have googled a great deal for this, but haven't found what i'm looking for. I'm not entirely sure i can fix this (even with a little help), but it can't hurt trying (50.000V don't hurt, does it :P). Besides, my wife is constantly gapping about how bad her substitute monitor is, so i'm desperate Mugge There were a few Viewsonic monitors that had problems with the video output IC failing and causing them to lose a color. The IC in these monitors was expensive and in short supply (I think they were around $100). Andy Cuffe Perhaps going back to basics first, it may be that you've even checked this already, but i've seen this happen in a few monitors in my time if one of the pins in the svga cable gets bent, broken, or if the cable just fell out a little bit. I remember one time a friend of mine who shall remain anonymous phoned up panicing because he had quite the opposite - his screen went all red and he thought it had gone into satanic mode!?! turns out the cable had just fallen partially out. heh. Its a poor connection at the 15 pin D plug 8 or 9 times out of 10. If its not that it could be anywhere in the system, monitor, lead, or less often video card. Fortunately red is the least needed of all the colours NT |
#6
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Viewsonic PF790 missing red
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#7
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Viewsonic PF790 missing red
Mughoj wrote:
skrev: heh. Its a poor connection at the 15 pin D plug 8 or 9 times out of 10. If its not that it could be anywhere in the system, monitor, lead, or less often video card. Fortunately red is the least needed of all the colours My wife plays games alot, and needs to see blood. Virtual og mine, she doesn't care, so the monitor needs red :P lol, best reason I ever heard. NT |
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