Re: Dell E153FPB Back Light problem
AC??? It should be DC.
PlainBill
Originally posted by freakytiki4u
PlainBill
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For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic. -
Re: Dell E153FPB Back Light problem
Yeah I knew that. (tries to avert your gaze) LOL , tested again with DC (ahem) and this time it showed 5 volts (bangs head on desk.)Comment
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Re: Dell E153FPB Back Light problem
you wont tell anyone I did that will you? LOL
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Re: Dell E153FPB Back Light problem
Of course not. If I did, you would tell everyone the TV story.Originally posted by freakytiki4uyou wont tell anyone I did that will you? LOL
PlainBill
p.s. We'll get back to the monitor once I wake up.
PBFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Dell E153FPB Back Light problem
LOL, too funny, Thank You Sir and Im sending a cup of Joe your way
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Re: Dell E153FPB Back Light problem
There are three possible causes of this problem. The power supply itself; the inverter,or the logic card. The only time I saw something similar was when their were shorted transistors in the inverter. This overloaded the power supply. HOWEVER, you have determined the 5V supply is stable. Next you can eliminate the inverter as a cause. This is the datasheet for the two ICs (actually paired power mosfets). Check each section of the pair for shorts. Check the resistance between D1 and G1, between G1 and S1, and between D1 and S1; repeat for D2 and G2, between G2 and S2, and between D2 and S2. Do this for BOTH ICs. If there are no shorts, unsolder one end of the jumper I have circled in the attachment. This completely isolates the inverter from the power supply. Now test the board in the monitor - no need to hook up the backlights. All we're interested in at this point is the behavior of the green power light.Originally posted by freakytiki4uLOL, too funny, Thank You Sir and Im sending a cup of Joe your way
The other two possible causes are the logic board, or more bad caps in either the power supply or the logic card.
PlainBillAttached FilesFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Dell E153FPB Back Light problem
I think I angered it. When I put the board back in to test it started smoking from the actual corner of the screen itself. LOL, Im just going to call this one a bust. Thank you for your patience with me. Until next time
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Re: Dell E153FPB Back Light problem
Sometimes sacrifices are necessary. When it's a burnt offering, it's better to sacrifice a monitor than and human - well, some humans.Originally posted by freakytiki4uI think I angered it. When I put the board back in to test it started smoking from the actual corner of the screen itself. LOL, Im just going to call this one a bust. Thank you for your patience with me. Until next time
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Dell E153FPB Back Light problem
I totally know what ya mean, I've been married 3 times. LOLComment
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Re: Dell E153FPB Back Light problem
Some people learn faster than others. At one time I introduced my wife as 'My first wife.' She retaliated by referring to me as her 'starter Husband.' I decided to refer to her as 'My trophy wife.' Things got a lot calmer after I came to my senses.Originally posted by freakytiki4u
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Dell E153FPB Back Light problem
Save the monitor. You can use parts of it to test (or even fix) other unit(s).Originally posted by freakytiki4uI think I angered it. When I put the board back in to test it started smoking from the actual corner of the screen itself. LOL, Im just going to call this one a bust. Thank you for your patience with me. Until next time
I have a box (not too big, but still a box) full of either received dead units, units killed by me in the name of science, or killed by others and donated to me. That box is a very precious resource sometimes ...There are 10 kind of people in this world: those that understand binary, and those who don't.- ASUS ROG Maximus IX Code
- Intel Core i5-7600K 3.8GHz
- 16gb GSKILL TridentZ RGB DDR4-3200
- 1 M2 SSD + 2 WD Blue 1TB (Mirrored)
- Windows 10 Pro x64
- GeForce GT1050
2 x Acer KA240H + 1 Vewsonic VP2130 21 (a cap replacement job
)
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Re: Dell E153FPB Back Light problem
Excellent idea!Comment
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Re: Dell E153FPB Back Light problem
So I read pretty much the entire thread and im afraid im still not sure where to start. I have the Dell
E153FPB. When i turn on the LCD screen it flashes white for a second and then goes black. I cannot see any image on the screen but the LED power light stays on.
I tested the fuse PF751 with an ohm meter and it has resistance, so im thinking its not that.
I also flipped the board over and didnt see any cold solder joints, fixed a couple that were debatable.
Sorry if this is a double post. I couldnt look any longer lolAttached FilesComment
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Re: Dell E153FPB Back Light problem
Used a flashlight to see if the panel is on and image is displayed (you would not see it clearly if the CCFLs are off but if you don't have an image, it's not the inverter or tubes.Originally posted by jschieferSo I read pretty much the entire thread and im afraid im still not sure where to start. I have the Dell E153FPB. When i turn on the LCD screen it flashes white for a second and then goes black. I cannot see any image on the screen but the LED power light stays on.
I tested the fuse PF751 with an ohm meter and it has resistance, so im thinking its not that.
I also flipped the board over and didnt see any cold solder joints, fixed a couple that were debatable.
Sorry if this is a double post. I couldnt look any longer lol
Post series/brand/capacitance of caps, and test each of the four c5707s in there.There are 10 kind of people in this world: those that understand binary, and those who don't.- ASUS ROG Maximus IX Code
- Intel Core i5-7600K 3.8GHz
- 16gb GSKILL TridentZ RGB DDR4-3200
- 1 M2 SSD + 2 WD Blue 1TB (Mirrored)
- Windows 10 Pro x64
- GeForce GT1050
2 x Acer KA240H + 1 Vewsonic VP2130 21 (a cap replacement job)
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Re: Dell E153FPB Back Light problem
How do i test capacitance of the caps? I have a multimeter...Comment
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Re: Dell E153FPB Back Light problem
I was referring to the specs of the actual caps installed, not the actual capacitance of the caps. If they are a known bad brand , suggestions of replacements would start flowing all over the place. That would be the first step for troubleshooting the board. Not all the problems are related to bad caps, but then again, bad caps can cause problems and interfere with troubleshooting, and as a general rule, if you are going to spend sometime with an open unit, it is usually viewed as a preventive measure, even if the caps are not failing but are of a brand that, under that conditions (heat and poor ventilation) would fail.Originally posted by jschiefer
Also, again, look for bad solder because that units tend to have that problem, even if it is not easily visible with the naked eye.
There are 10 kind of people in this world: those that understand binary, and those who don't.- ASUS ROG Maximus IX Code
- Intel Core i5-7600K 3.8GHz
- 16gb GSKILL TridentZ RGB DDR4-3200
- 1 M2 SSD + 2 WD Blue 1TB (Mirrored)
- Windows 10 Pro x64
- GeForce GT1050
2 x Acer KA240H + 1 Vewsonic VP2130 21 (a cap replacement job)
Comment
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Re: Dell E153FPB Back Light problem
Start with post 31 of this thread and follow the same advice.Originally posted by jschieferSo I read pretty much the entire thread and im afraid im still not sure where to start. I have the Dell E153FPB. When i turn on the LCD screen it flashes white for a second and then goes black. I cannot see any image on the screen but the LED power light stays on.
I tested the fuse PF751 with an ohm meter and it has resistance, so im thinking its not that.
I also flipped the board over and didnt see any cold solder joints, fixed a couple that were debatable.
Sorry if this is a double post. I couldnt look any longer lol
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Dell E153FPB Back Light problem
I tested mine and got about 426 is that too far off?Originally posted by BobdeeComment
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Re: Dell E153FPB Back Light problem
Different brands of meters give different results. Were the results the same for all transistors?Originally posted by jschiefer
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Dell E153FPB Back Light problem
Yes they all were. Its a cheap meter so i thought they were find.Originally posted by PlainBill
I also looked at my LCD with a flashlight to see if i can see the image after it flashes white and i cant see an image. What does this mean?Comment
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This happened last Saturday and today I finally had time this morning before I went to work to replace two non brand capacitors
I will let you be the judge weather or not these are bad or not according to the blue ESR meter that I am using
I am comparing them to a brand new one that I installed
The display came back on and the programming was not lost which I was surprised by I would have thought that when the display went blank that so did the memory as well
I going to let it run for several days before I remount back on the wall next to the... -
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