Hi ..I need the diagram of the power supply of this monitor .. liquid leaked in it, and some parts exploded ... I did not find the exact scheme, but just something similar .. does not want to start .. thank you ..
Attached Files
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Re: Hp elitedisplay e231 monitor
What was the PWM U901? -
Re: Hp elitedisplay e231 monitor
I don't know exactly ... it had a hole in it ... but, I'm sure of the LD757 ... the rest couldn't be seen ... I solder the LD7575, but maybe it was the LD7576 ...
Q901 = P0765ATF
D908 = 1N4148
R923 = 220 OHM
R924 = 0.47 OHM
I don't know the value of R915, R917, U901..the rest of the parts are OK..I didn't find an exact scheme, I tried the approximate schemes I found, but it doesn't start ..Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:
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Re: Hp elitedisplay e231 monitor
This is somewhat similar to your circuit.Attached FilesComment
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Re: Hp elitedisplay e231 monitor
yes .. thanks for the diagram ... the problem is that I still have resistance R915 in series with R917 and I don't know the value ... although LD7575 is compatible pin to pin with LD7576, less pin 1 (CT, RT) .. .This pin is for programming the switching frequency. By connecting a resistor to ground (LD7575), .... By connecting a
capacitor to ground (LD7576) .. here I think is the problem .. I will put a resistor with value (0) instead of R915 ..Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:
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Re: Hp elitedisplay e231 monitor
everything works perfectly..for LD7576 it is used in pin "1" C927 = 0.047mf, without R921, for LD7575, C927 is removed, and R921(100Kohm) is solder..R915 strap ..Last edited by peste; 11-22-2021, 11:26 AM.Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:
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Re: Hp elitedisplay e231 monitor
So his native PWM was LD7576.Comment
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Normally, I never post repairs this quick after I do them, because… I am usually very slow.
But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though. 
I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
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I do not necessarily have to control the keyboard or mouse because I can do this on each computer now I just need to have the display of each computer on one monitor screen
Is there such a monitor or a device that can do what I have in mind
I am not sure if this is the right forum for this kind of question if not can you please move to the correct forum thanks... -
Hi Everyone
Lately I am experiencing the deja-vu incident on one of the led monitor like this.
https://www.badcaps.net/forum/troubl...lashing-on-off
The monitor is HP 27es LED Monitor
https://h30434.www3.hp.com/t5/Deskto...e/td-p/6804692
The monitor will randomly blackout and display no signal and will recover again.
Sometimes need to power and off again to restore the display but... -
Good evening, gentlemen.
I have a problem with my monitor. It turns off after a few seconds or flickers. Shining a flashlight on the screen doesn't show any image, so I guess it's not the "2 seconds to dark" I read in the forum.
To turn it back on, I have to press the power button twice. Then after a few seconds it turns off again or flickers. See video.
https://drive.google.com/file/d/1L6S...ew?usp=sharing
Things I tried
- Bought a new AC adapter thinking that was the problem but the problem... -
Looking through my repair pictures and notes, it's been a long time since I posted anything in the LCD monitors section. So here goes that.
I'm dedicating this thread to one of the very first LCD monitors I repaired (if not the first one), which was more than 10 years ago now. The monitor is a Wise Wing, model F199. It's a 19” CFL-backlit LCD. I got it for free off of Craigslist in 2009 from a guy, who said he bought it for cheap from Wallmart and the monitor worked only for a little less than 2 years before quitting.
When I saw the Craigslist post, I wasn't...
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