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polaret



Joined: 23 Oct 2004
Posts: 90
Location: greece

PostPosted: Wed Dec 12, 2007 6:43 pm    Post subject: daewoo l i1911mn Reply with quote

I have this monitor and after 10-15 minutes the picture disapears at first flashing and then black when i reconnect the PC gives sign no signal
can any one help
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Neil Kwyrer
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PostPosted: Thu Dec 13, 2007 8:26 am    Post subject: Daewoo monitor Reply with quote

There is a fault in your monitor- it could be anything- the point is that you are seeking a simple answer to a complicated question(as do many)- the bottom line is that experience & knowledge are needed to fix the fault- you don't have- find a good tv tech.
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polaret



Joined: 23 Oct 2004
Posts: 90
Location: greece

PostPosted: Thu Dec 13, 2007 4:45 pm    Post subject: Reply with quote

I am a tv tech but i have never take that kind of monitor, with that kind of damage, i have change all the capasitor and the first problem solved that is the second one .
If someone have ever that kind of pro it could be usefull, thats why you make a post, we are not seeking for a smart guy but for smart answers
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vtech



Joined: 08 May 2006
Posts: 1264
Location: USA

PostPosted: Thu Dec 13, 2007 5:27 pm    Post subject: Reply with quote

Not familiar with the specific monitor but , sounds like it may be a "thermal" issue? ---may be try using a component cooler on the circuit?

In general, the "no signal" message is triggered when there is no video synch detected &/or lost from the detection circuitry which can be inside of a signal process IC. Anything from a connection issue or malfunction in synch. processing can cause it. If you can find a schematic & scope the signal, should give you some ideas.
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polaret



Joined: 23 Oct 2004
Posts: 90
Location: greece

PostPosted: Thu Dec 13, 2007 5:48 pm    Post subject: Reply with quote

Maybe i was not explicit , the problem is not that says <no signal> but the picture goes down (black)after flashing .
when the picture is black i disconnect the PC and appears <no signal> maybe some dry joints or proseccor internal fault ,but i have no diagram to seek for

vtech thanks anyway
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