Re: Gaurdall G-LCD19B
Right better pic now
Gaurdall G-LCD19B
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Re: Gaurdall G-LCD19B
I have tried 2 seperate power supplies and get the same result.
I know i need better picture will do that tomorrow and will post
I tried the LCD panel in my Xerox unit as this has no screen but comes in handy for testing ,
but i dont have another of these boards cant even find one online it has no makers name or code just VA-3700 VER:1.1 and it is a single sided board there are no components on the back .
But have found the monitor its a professional IT and security monitor (bit of a mix) has 1 vga 2x s vid 2x bnc i think they are called and has a hard glass front quite a nice unit in allLeave a comment:
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Re: Gaurdall G-LCD19B
I'm assuming you have verified the external power supply is good. If so, a better picture is a good idea. I can identify two voltage regulators, and there is at least one and possibly two more candidates. verifying they are working would be the next order of business.
PlainBillLeave a comment:
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Re: Gaurdall G-LCD19B
You say you took out lcd panel and it tested good on another monitor. Was that monitor also the same model as the one in question? If yes, have you tried swapping the logic/video card from the "good" monitor to see whether or not the card is the problem?Leave a comment:
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Re: Gaurdall G-LCD19B
Have checked the wires and they are working (have continuity from one end to the other s assume its okLeave a comment:
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Re: Gaurdall G-LCD19B
Have you ruled out the cable connecting the LCD to the main board?Leave a comment:
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Re: Gaurdall G-LCD19B
The monitor shows only white screen but as i said that tested ok on another unit.
The switches do nothing when connected but all the pins where the switch panel connects show voltage except the earth pin so the inverter runs constantly it is possible that someone has put in a new inverter board and not wired it correctly.
Have checked voltages on other parts to see if supply is going in and out but these have been checked against data sheets for the individual parts and not data sheet for the board.
I will post a pic of the whole set up when i get camera workingLeave a comment:
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Re: Gaurdall G-LCD19B
And I'm sure that you'll eventually tell us what it is, but in the description you posted I can't detect one.
Looked online but cannot find a data sheet for the board so just wondered if anyone had come across this board (VA-3700 VER:1.1) or a similar problem before.
Have uploaded a pic just so you can see it not a good one need batteries for camerahad to use phone.
Any help or input appreciatedLeave a comment:
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Gaurdall G-LCD19B
HI have a problem with this unit .
Not sure if its a caps problem but thought someone may have a clue as to the problem.
Firstly when power is applied (12v 4a) the screen lights up so inverter working ok .
Took out lcd panel and tested on another unit and it works fine .
Disconnected the control switch panel and it still powers up so something is amiss on the control board.
Looked online but cannot find a data sheet for the board so just wondered if anyone had come across this board (VA-3700 VER:1.1) or a similar problem before.
Have uploaded a pic just so you can see it not a good one need batteries for camerahad to use phone.
Any help or input appreciatedTags: None
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