Hat geantwortet auf: A1267 ACD 24" backlight issue@morgan I had exactly the described problem 2 months back, I did some extensive research and tests with my oscilloscope. I am not yet 100% where the problem lies but the monitor has worked perfectly for 3 weeks now. I disassembled my display totally including the LG Panel and took some images. See the ifixit.com 27" What components need replacing on the Logic board? I took apart the LED stripe as well and desoldered it. In addition to changing 8 capacitors in the power source and now the display works as a charm. I have also some pictures how to get the LED connector out, but that is really tedious, see the pics. What components need replacing on the Logic board?
Hat geantwortet auf: Apple LED Cinema dont work. Please help!I just fixed a different issue in my 24" CINEMA displaz so I had to dig pretty deep into the display manuals and IC chips on the logic board. Maybe if you send me the exact details of your display, see http://www.everymac.com/ultimate-mac-lookup/?search_keywords=2316 Then I can get an image what device you exactly have. Can you also take a high precision image of the IC chip side of your logic board, to verify that no chips are burned. Then if possible try to connect another cable to the Logic board to rule out the cable fault. PS: ich kann auch deutsch. Update (03/08/2017): So you have exactly the same device as I do. OK. Now, (1) you say that the Fan spins (2) the monitor is not recognized by the system, no iSight and no USB hub (3) The test voltages are ok, according to the service manual. (4) The charging is still working Check if you have a faint image on the LCD, no backlight? Did the display work before? or was it dead already when you got it? Try to lay it horizontal and see if it works. It sounds lit...
Hat geantwortet auf: What components need replacing on the Logic board?@John &Io Nut I have an LED cinema display 24" from 2009, I have excatly the problem that the screen blanks out after a 1 sec flash of the image (probably LED driver signal turns down). I was about to try the bypass solution above for the 3.3V drive input, but then wanted to ask first if the same backlight strip probem problem could be on my LED Display as well, because I would not want to loose the dispay dimming possibility. update: So I did take the LG LCD panel apart in search for the notorius LED Strip, see pictures: Taking the LCD apart: The LCD frame, The Backlight panel, The plastic frame, The glass of the panel, The back plate, Finally getting down to the LED Strip So I did resolder the LED connector (just added some solder to it and re-heated the 5 pins again thoroughly), but my problem still persists, the LED stripe only flashes quick at connection display port connection time. I am considering of doing some logic measurements tonight with my oscilloscope for the LED driver, but the willi fix for b...