• Monitor/telewizor LG DM2780D – szary ekran, zakłócenia

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  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
  2. Topic message should contain: the PCB marking code (required in case of hardware repairs), an extended description of problem, things you have checked/replaced/measured, your conclusions and the question. If you are not able to find the PCB marking code, please read THIS TOPIC. If you still cannot locate the PCB markings, please upload a clean, both-side photos of the mainboard - it is required to remove any films, modules or brackets possibly covering these markings.
  3. Before posting a new topic please read all topics in TRAININGS subforum and make a preliminary diagnostic based on the content of those trainings.
  4. Uploading of any complete schematics, BIOS / firmware files or any other kind of documentation, or linking to 3rd party websites with such files, is STRICTLY PROHIBITED. You can only upload the small portion of documentation or, link to BIOS file on UNVERIFIED BIOS FILES subforum, which simplifies the diagnostics/repair. You are not allowed to upload more then one complete page of instruction/schematic per single topic. The file you upload must not contain any watermarks, "confidential" markings, links or email addresses and cannot be password-protected.
  5. It is only permitted to describe one faulty device per single topic - you should always open a new topic for each subsequent device.
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#1 Monitor/telewizor LG DM2780D – szary ekran, zakłócenia


by msiedlin 4 November 2025, 23:31
Mam telewizoro-monitor LG DM2780D.
CHASSIS : LD93L
Pokazuje szary ekran z poziomymi zakłóceniami czasami ekran robi się na chwile czarny czasami przełącza się w tryb testowania matrycy. Po kolei wyświetlają się różnokolorowe obrazy/rastry.
Wyczyściłem eeprom iC104 procesor go nadpisał ale nie przyniosło skutku. Przeprogramowałem zawartość flasha SPI wsadem znalezionym w sieci, ale bez powodzenia dalej to samo.
Zauważyłem,że podpinając laptopa do tego monitora laptop nie wykrywa zewnętrznego ekranu, związku z tym sprawdziłem zasilanie na eepromach przy wejścach HDMI zasilanie jest, napięcie mniejsze niż 5V ale zasilanie przechodzi jeszcze przez 2 diody, wiec nie czepiałbym się tego.
Dodam,że mierzyłem napięcia na wszystkich przetwornicach są i są stabilne (pomiar multimetrem)
Może coś podpowiecie ? Ja już pomysłów nie mam.
Pozdrawiam
Michał

Re: Monitor/telewizor LG DM2780D – szary ekran, zakłócenia


by Google Adsense [BOT] 4 November 2025, 23:31

#2 Re: Monitor/telewizor LG DM2780D – szary ekran, zakłócenia


by matic 5 November 2025, 08:53
Hello!

Plug the TV to a SCART source (e.g. DVD player) and check if you get a sound from the TV speakers.

Re: Monitor/telewizor LG DM2780D – szary ekran, zakłócenia


by Google Adsense [BOT] 5 November 2025, 08:53

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