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Nec 1550v multisync

Screen will go black overnight & takes several minutes to come on the next morning when trying to sign on. Problem will get worse... take longer & longer to come on, then will not come on at all. I am a tech & see this on many units. We just discard them when they do this. Any fix? Thanks, Keith

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The problem is most likely in the inverter or in the powersupply. The lcd matrix is most likely in a fine shape.

Fixing them might not be worth the effort and time.

Basicly Id test it first by replaceing the controlboard / inverter.
after that the powersupply.

Pretty easy fix but is it worth the parts?

In most cases you could replace the
capacitors, xformers digital control devices ad IB4G said
but its easyer to just replace the whole board.

If you need more asistance, let me know. Good luck.

Posted on Apr 02, 2008

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This is sign of your power board dying slowly..

Posted on Apr 02, 2008

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Well...to an extent..this is most likely a power supply issue internally. There are three major components that fail.

capacitors
xformers
digital control devices

solution...pirate a known good board from one that has a bad tube..

Posted on Mar 19, 2008

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1 Answer

Why does a monitoring keep going off?


you forgot to say, screen dark? and power light off.
does the OSD work? Push button that pops up the OSD screen for bightness, does that work>
\can be one of 4 things. 100 % dead.
try it on another PC>
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bad video cable.
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try another PC and see if the LCD works there.
easy huh?

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Best of luck..

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