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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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NEC MultiSync LCD1555V
hey again, I've got an NEC MultiSync LCD1555V here, which a friend
gave to me, and it's not working right. you turn it on, and the screen is lit up, but no picture - or so I thought. after disassembling it, and not finding anything visibly wrong with it, I put it back together and as I was putting the case back together I figured I'd plug it in and try it again right quick. I did so, and I was holding it at an angle. apparently there is picture. it's just so bright that it's not visible generally. you have to look at it in a way that the light isnt being shown through it at its maximum effect. when I try any of the buttons on the front(other than power, which functions properly) it brings up a dialog on the screen saying at the top "video input" and then it says "Out of range" as the message. so I can't change brightness or anything. any ideas? I can also make out my desktop, so I know it is -working- just not correctly. and the screen goes into standby if you unplug the video cable, so power seems to work right. |
#2
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NEC MultiSync LCD1555V
kronflux wrote:
hey again, I've got an NEC MultiSync LCD1555V here, which a friend gave to me, and it's not working right. you turn it on, and the screen is lit up, but no picture - or so I thought. after disassembling it, and not finding anything visibly wrong with it, I put it back together and as I was putting the case back together I figured I'd plug it in and try it again right quick. I did so, and I was holding it at an angle. apparently there is picture. it's just so bright that it's not visible generally. you have to look at it in a way that the light isnt being shown through it at its maximum effect. when I try any of the buttons on the front(other than power, which functions properly) it brings up a dialog on the screen saying at the top "video input" and then it says "Out of range" as the message. so I can't change brightness or anything. any ideas? I can also make out my desktop, so I know it is -working- just not correctly. and the screen goes into standby if you unplug the video cable, so power seems to work right. Try dropping your screen RES down in the computer. |
#3
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NEC MultiSync LCD1555V
just tried that. dropped it to 800x600, which is the lowest I could
set it to, and it did the same thing. I could still see the desktop vaguely, and the menu did the same thing. "Out of range" |
#4
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NEC MultiSync LCD1555V
I also thought about lowering the refresh rate, but it only allows me
60. which is odd. but yeah. |
#5
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NEC MultiSync LCD1555V
okay so I just hooked it up to an older PC. same result except I can
now get into the menu. I've tried changing everything. that includes brightness and contrast. nothing worked. |
#6
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NEC MultiSync LCD1555V
On Sat, 26 Dec 2009 16:55:49 -0800 (PST), kronflux
wrote: hey again, I've got an NEC MultiSync LCD1555V here, which a friend gave to me, and it's not working right. you turn it on, and the screen is lit up, but no picture - or so I thought. after disassembling it, and not finding anything visibly wrong with it, I put it back together and as I was putting the case back together I figured I'd plug it in and try it again right quick. I did so, and I was holding it at an angle. apparently there is picture. it's just so bright that it's not visible generally. you have to look at it in a way that the light isnt being shown through it at its maximum effect. when I try any of the buttons on the front(other than power, which functions properly) it brings up a dialog on the screen saying at the top "video input" and then it says "Out of range" as the message. so I can't change brightness or anything. any ideas? I can also make out my desktop, so I know it is -working- just not correctly. and the screen goes into standby if you unplug the video cable, so power seems to work right. The most likely possibility is a failure in the backlight system. Open it up and check for shorted transistors, blown fuses, etc in the power supply and inverter (often combined on one board). www.badcaps.net/forum has a section on troubleshooting and repairing these problems. PlainBill |
#7
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NEC MultiSync LCD1555V
On Sat, 26 Dec 2009 21:03:58 -0500, Jamie
t wrote: kronflux wrote: hey again, I've got an NEC MultiSync LCD1555V here, which a friend gave to me, and it's not working right. you turn it on, and the screen is lit up, but no picture - or so I thought. after disassembling it, and not finding anything visibly wrong with it, I put it back together and as I was putting the case back together I figured I'd plug it in and try it again right quick. I did so, and I was holding it at an angle. apparently there is picture. it's just so bright that it's not visible generally. you have to look at it in a way that the light isnt being shown through it at its maximum effect. when I try any of the buttons on the front(other than power, which functions properly) it brings up a dialog on the screen saying at the top "video input" and then it says "Out of range" as the message. so I can't change brightness or anything. any ideas? I can also make out my desktop, so I know it is -working- just not correctly. and the screen goes into standby if you unplug the video cable, so power seems to work right. Try dropping your screen RES down in the computer. ??? He can see the desktop. Why would you think running at too high a resolution cause the backlights to fail? PlainBill |
#8
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NEC MultiSync LCD1555V
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#9
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NEC MultiSync LCD1555V
apparently, having too high or low of resolution or refresh rate, can
cause the problem with the on screen menu repeating "Out Of Range" no matter what you press. after hooking it up to another computer, with an older video card, I was able to access the menu flawlessly. thats why people were talking about resolution. the other problem is the one I'm more concerned about. I think it may have to do with the LCD itself being faulty. I don't think the backlighting is too high or anything. I think what's happening is that the LCD isn't getting enough contrast to be visible or something. |
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