Re: Dell 2209WA turns off after a while
Since the monitor turned back on I tried what you suggested.
When I disconnect the inverter board the 24V still comes on and stays on.
This should rule out any problems with the inverter/CFL right?
Maybe I could use a hairdryer to warm the main PCB in different corners and see if it turns off? Or is this a bad idea?
PS. I just realized I wrote 3 posts in a row. Sorry about that....
Sanjuro
New Member
Last Activity: 12-09-2023, 03:35 PM
Joined: 11-25-2018
Location: Internet
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Last edited by Sanjuro; 12-15-2018, 06:29 AM. -
Re: Dell 2209WA turns off after a while
Ok, so the monitor turned back on again today. Now it's just making a fool out of me.
But at least I know I didn't break it more.Leave a comment:
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Re: Dell 2209WA turns off after a while
Not any more. I connected everything together yesterday and it's not turning on even for a minute.
The blue LED is ON but I don't get the picture anymore. No backlight.
As I mention, maybe the time I spent doing measurements on "broken" state has finally finished the faulty component?
So the measurement below was made when ther's no backlight:
switch OFF = 308V on main cap
switch ON = 377V on main cap
no backlight and no 24V. But BlueLED ON
BTW, thank you for your...Leave a comment:
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Re: Dell 2209WA turns off after a while
I connected everything right now including a video source from tuner.
switch OFF = 308V on main cap
switch ON = 377V on main cap
Still no backlight and no 24V. But BlueLED ON.Leave a comment:
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Re: Dell 2209WA turns off after a while
@budm
1) Yes
2) Yes - F851 and F852 are OK
3) OK
4) It's right below FR850. Sorry for the bad photos.
All the measurements that I've done was after the monitor went dark. I don't have the measurements from the working state.
Well, I connected all the boards together today and it's still dark so I don't know if it's not intermittent anymore or if my measurements did something. The blue LED is still working fine though. It switches ON when I press...Leave a comment:
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Re: Dell 2209WA turns off after a while
1) Oh, I see. My reasoning was to try tracing from the negative leg and see where it disappears. I hope I didn't damage anything.
2) I connected all boards and I tried measuring it again:
on the main cap and I get:
switch off = 295V
switch on = momentarily 402V and then it settles at 380
24V (between pin1 and 4 on the connector that goes to the inverter)
switch off = 1mV
switch on = rises and settles at around 31.5mV
So still no 24V. Would there still be 24V here if the...Leave a comment:
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Re: Dell 2209WA turns off after a while
Hi, again
So it would appear that there's no 24V because the transformer T850 is not getting the power.
Please, correct me if I'm wrong but the transformer should get the power from the Q850 transistor but it's not getting it? The IC that should be driving the Q850 is U850 but there is no power on the pin12 of it. Am I measuring and understanding it correctly?
Also, the service manual is getting me a bit confused. I've attached the part that I'm talking here. It says that there should be 354V on the pin8 of the...Leave a comment:
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Dell 2209WA turns off after a while
Hi, I'm trying to fix my monitor but it would appear that its something more serious than just bad caps or cold joints.
[B]Monitor history:[/B]
I used it for about 6 years and then the monitor was stored unused for about 1.5 years in my room but now I wanted to use it as a small TV so I connected it to the tuner. It worked for a couple of hours and then it started to turn off and on a couple of times and then it stayed off (blue LED indicator still ON). I plugged it in the next day and it worked again but after about 2h it started to go black again.
[B]What... -
Re: New Members - please post your introductions here
Hi everybody!
I'm trying to fix my Dell 2209wa so I hope I'll some info here.Leave a comment:
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