Re: Benq G2400W 2 second to black problem
Any thoughts on what I can do next? I'm kinda wary about buying new CCFLs since there's some doubt that they're bad.
And I'd have to buy larger diameter sized ones to get the length I need, or custom ones (which is beyond what I'm willing to pay to repair it).
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
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Re: Benq G2400W 2 second to black problem
It's secure. The shrink wrap is also holding it in place. No amount of tugging is going to detach the wire.
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Re: Benq G2400W 2 second to black problem
Actually, I can't really get a good look at the connection because it's all shrink wrapped. I'd have to cut it, and probably cut into the wire as well in the process.
I can if you think it'll help.
If we assume the CCFLs are ok, what could I do next to figure out the problem?...
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Re: Benq G2400W 2 second to black problem
So my CCFLs are 525mm long, with a diameter of 2mm. At the ccfl warehouse, only the 2.4mm ones go up to that length. Would those be ok?
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Re: Benq G2400W 2 second to black problem
Oh, and thank you for all your help.
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Re: Benq G2400W 2 second to black problem
Does it have to be exactly the same size in length and width?
My monitor has 525 mm sized CCFLs, and only a few of the diameters listed on that site go up to that size. Or I'd have to get custom sized ones, which are too expensive in my opinion.
Do all the sizes use the same power? Because that's what would matter for my case.
Actually, I use sleep mode on it, but it probably got close to 12 hours of use daily though.
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Re: Benq G2400W 2 second to black problem
Ok, so there are four CCFLs, in pairs. 1 on top, 1 on the bottom.
They all light up fine for about 2 seconds. They are not pinkish. All of them show burning on the ends, like this:
[url]http://s807.photobucket.com/albums/yy352/budm/Bad%20backlight%20lamp/?action=view¤t=DSCF2058.jpg[/url]
So is that the issue?Re: Benq G2400W 2 second to black pr... seconds. They
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Re: Benq G2400W 2 second to black problem
Argh,
This monitor is hard to disassemble. The CCFLs are buried in layers of plastic and metal.
I just removed the LCD layer, and I see another logic board on it.
Well, I'm off to take it apart so I can see the CCFls.
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Re: Benq G2400W 2 second to black problem
Ok, I tried plugging in the CCFLs one at a time, but the 2 seconds to black problem persists.
Any thoughts on what I can try next?
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Re: Benq G2400W 2 second to black problem
I checked out the mosfets you asked for. It's hard knowing whats the source, drain, and gate, but with the continuity tester I found the drain is all connected on the left side. So I guess it looks something like this although the source and gate may be in different pin locations.
[url]http://www.datasheetdir.com/MTN4410Q8+N-Channel-MOSFETs[/url]
Anyways, none of the combinations of results in a reading lower than 200 ohms for
a) black on pin S1- red on pin G1 - record ohms
b) black on pin S1-...Last edited by hechacker1; 01-18-2012, 07:51 PM.
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Re: Benq G2400W 2 second to black problem
1st Transformer:
S1-S2: 1.03K
P1-P2: 0.3
P3-P4: 0.3
S3-S4: 1.03K
2nd Transformer:
S1-S2: 1.04K
P1-P2: 0.3
P3-P4: 0.3
S3-S4: 1.02K
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Benq G2400W 2 second to black problem
Recently my Benq g2400w started exhibiting the "2 second to black" symptom. When I turn it on, the display will work fine for about 2 seconds before turning off to black.
I can switch inputs to VGA, DVI, or HDMI, but the symptom persists.
I suspected perhaps it was bad caps, but they all look fine from an external view. I also used my cheap multimeter to see if they charged up, and they do. I also tested all the diodes I could find, and they read approximately right values 0.6-0.8 volts
I looked at all the solder joints, and even reflowed a few that looked...Last edited by hechacker1; 01-18-2012, 02:42 PM.
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